HOW TO DO AN ADVANCED SEARCH.
Mon Jul 08, 2013 3:56 pm by Admin
For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.
When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).
After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …
Comments: 0
Similar topics
Latest topics
Log in
Could someone check my plans for wiring the fuse block?
+3
robstah
Admin
Arthropraxis
7 posters
944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: Electrical Mods
Page 1 of 2
Page 1 of 2 • 1, 2
Could someone check my plans for wiring the fuse block?
Could someone give me some feedback on this? The motor and computer are from a 2004 GTO that has the blue and green connectors. This is how I am going to wire the fuse block:
Switched Power
ignition 3 voltage C1 pin 19 Orange wire
Ignition 1 voltage Pink wire to heated O2 sensors
Fuel Injection and Ignition Control Module wire bank one Lt Green wire
Fuel Injection and Ignition Control Module wire bank two Red wire
Battery Power
Fuel pump relay
Orange battery positive voltage from C1 pins 20 and 57
I thought all orange wires went to battery positive.The schematics show the ignition 3 voltage going to a key source, that would make it switched right? That is where my confusion is.
Thanks, for any feedback.
Switched Power
ignition 3 voltage C1 pin 19 Orange wire
Ignition 1 voltage Pink wire to heated O2 sensors
Fuel Injection and Ignition Control Module wire bank one Lt Green wire
Fuel Injection and Ignition Control Module wire bank two Red wire
Battery Power
Fuel pump relay
Orange battery positive voltage from C1 pins 20 and 57
I thought all orange wires went to battery positive.The schematics show the ignition 3 voltage going to a key source, that would make it switched right? That is where my confusion is.
Thanks, for any feedback.
Last edited by Arthropraxis on Fri May 13, 2011 8:21 am; edited 1 time in total
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
Fuel injection control wires are not the same as ignition wires. They should run directly to the injector from the computer. The second wire on the injectors should be a pink ignition wire.
Re: Could someone check my plans for wiring the fuse block?
The lt green and red wires go to the fuse block to power the ignition control module and fuel injectors. This is a 2004 GTO, in an F-body those would be Pink wires. What is confusing is the ignition 3 voltage wire being orange, I thought all the switched connections were Pink. The schematic shows it going to the ignition switch and being on in start, so it is obviously switched. Answered my own question.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
I got it sorted. The orange wire is switched voltage to the ECM and the injector voltage wires are green and red. On an F-body all of the mentioned wires would be pink. Going to wire it up tomorrow and install it in the car.
I am going to go with wiring the fans through the Porsche relay. From what I can tell the high/lo fan relay wires from the GM ECM should splice into the Porsche coolant temperature switch wires going to the Porsche fan relay. GM Hi speed to the RT/WS colored wire labeled TF on the fan relay. The low speed GM would splice to BR/GE wire going to TS on the Porsche fan relay. Is this correct?
I am going to go with wiring the fans through the Porsche relay. From what I can tell the high/lo fan relay wires from the GM ECM should splice into the Porsche coolant temperature switch wires going to the Porsche fan relay. GM Hi speed to the RT/WS colored wire labeled TF on the fan relay. The low speed GM would splice to BR/GE wire going to TS on the Porsche fan relay. Is this correct?
Last edited by Arthropraxis on Sat May 14, 2011 9:15 am; edited 1 time in total
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
I am just copying what was done here:
http://www.lt1swap.com/fuseblock_obd2port.html
http://www.lt1swap.com/fuseblock_obd2port.html
robstah- Posts : 352
Join date : 2009-08-28
Age : 38
Location : Athens, GA
Re: Could someone check my plans for wiring the fuse block?
That is what I am doing, too. The confusion was with the different wire colors in the GTO harness. Between that writeup and Xschop's diagram it makes wiring the fuse block simple.
FYI, if anyone uses the relay holders he recommends on LT1swap.com the pigtails on them need larger gauge wires and regular connectors won't work. The connectors will have to be ordered from the link he provides to Mouser.com.
FYI, if anyone uses the relay holders he recommends on LT1swap.com the pigtails on them need larger gauge wires and regular connectors won't work. The connectors will have to be ordered from the link he provides to Mouser.com.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
Fuse block and Relays mostly wired. Now I need help getting the switched power and fuel pump from the Porsche fuse block. The fuse block is pulled up exposing the wires underneath.
Xchop's diagram shows switched power coming from a black/red wire. There are three black/red wires in that section of the fuse block. One is big 8ga or better, the other two are about 16ga. One of the 16ga wires is red with a black stripe the other is black with a red stripe. I know it is supposed to go to fuse 36 but I can't tell from underneath where the wires are going.
The fuel pump wire should be green with a black stripe. There are two. It looks like one is more toward the drivers side, hard to tell.
When the diagram says tie into those wires does that mean to expose some of the Porsche wire and connect to it or to cut the Porsche wire and tie in the new wire?
Thanks, for any help.
Xchop's diagram shows switched power coming from a black/red wire. There are three black/red wires in that section of the fuse block. One is big 8ga or better, the other two are about 16ga. One of the 16ga wires is red with a black stripe the other is black with a red stripe. I know it is supposed to go to fuse 36 but I can't tell from underneath where the wires are going.
The fuel pump wire should be green with a black stripe. There are two. It looks like one is more toward the drivers side, hard to tell.
When the diagram says tie into those wires does that mean to expose some of the Porsche wire and connect to it or to cut the Porsche wire and tie in the new wire?
Thanks, for any help.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
You can get to the fuel pump wire through the 14 pin connector that's in the engine bay; I cant remember the pin number. I tapped into the radio fuse with one of these.
Or you could test the voltage of those wires with and without the car in "run".
Or you could test the voltage of those wires with and without the car in "run".
spence- Posts : 684
Join date : 2009-07-21
Age : 41
Location : St.Catharines, Ontario, Canada
Re: Could someone check my plans for wiring the fuse block?
Also check pin 7 on that 14 pin connector. Do it without the DME relay and see if you get switched power through it.
robstah- Posts : 352
Join date : 2009-08-28
Age : 38
Location : Athens, GA
Re: Could someone check my plans for wiring the fuse block?
Thanks, I have something like that fuse in my box now. I thought it was some sort of add on for a stereo or alarm system. I read that the pin in the 14 pin firewall connector that goes to the fuel pump does not get power with the DME relay removed. I don't have a battery in so I can't check switched power.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
Arthropraxis wrote:Thanks, I have something like that fuse in my box now. I thought it was some sort of add on for a stereo or alarm system. I read that the pin in the 14 pin firewall connector that goes to the fuel pump does not get power with the DME relay removed. I don't have a battery in so I can't check switched power.
The green and black wire goes to the fuel pump and does get energized by the DME relay. The thing is, if you are following the lt1swap relay bit, then you use this wire to go to the fuel pump. Here's the diagram (click image to see it all):
robstah- Posts : 352
Join date : 2009-08-28
Age : 38
Location : Athens, GA
Re: Could someone check my plans for wiring the fuse block?
Yes, I copied the LT1swap.com fuse/relay block example. If that line does work for the fuel pump with the DME removed that will solve that issue, easily. Thanks.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
I used that same connector that Spence posted on Fuse #36 for the PCM relay.
Also Fuse #34 can also be bypassed and the fuel pump hot wire (green/blk)can be tapped into at the 14 pin connector directly at the firewall (Pin #4) as it is DEAD when there is NO FACTORY DME RELAY.
Also Fuse #34 can also be bypassed and the fuel pump hot wire (green/blk)can be tapped into at the 14 pin connector directly at the firewall (Pin #4) as it is DEAD when there is NO FACTORY DME RELAY.
xschop- Posts : 2711
Join date : 2009-06-09
Location : OKC
Re: Could someone check my plans for wiring the fuse block?
This was posted by MichaelB on the old site
Switched 12VDC supply to turn on ECU can be pin #2 or #3 (on 14 pin).
Coolant temp "W" to pin 10 blu/small yel - "G" to pin 8 blu/ large yel (on 14 pin).
Oil pressure "WK" to pin 9 blu, "G" to 6 (on 14 pin).
Pin #4 on the 14 pin works for power to the fuel pump. You may remove fuse #34 to prevent feeding the power back to the DME relay.
The flat 7 or 8 pin connector under the dash pass side = #2 green/black tach signal.
The two pin under the hood large red/black is starter solinoid. The small blue is alt /light.
That reads as if you can get switched power from the 14 pin connector. That would just be too easy. So, probably won't work.
Switched 12VDC supply to turn on ECU can be pin #2 or #3 (on 14 pin).
Coolant temp "W" to pin 10 blu/small yel - "G" to pin 8 blu/ large yel (on 14 pin).
Oil pressure "WK" to pin 9 blu, "G" to 6 (on 14 pin).
Pin #4 on the 14 pin works for power to the fuel pump. You may remove fuse #34 to prevent feeding the power back to the DME relay.
The flat 7 or 8 pin connector under the dash pass side = #2 green/black tach signal.
The two pin under the hood large red/black is starter solinoid. The small blue is alt /light.
That reads as if you can get switched power from the 14 pin connector. That would just be too easy. So, probably won't work.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
Get rid of that POS factory DME, it'll leave you stranded.
xschop- Posts : 2711
Join date : 2009-06-09
Location : OKC
Re: Could someone check my plans for wiring the fuse block?
xschop wrote:Get rid of that POS factory DME, it'll leave you stranded.
I take it you mean the DME relay?
Apparently Porsche changed the pin order on the 14 pin through out the 924/944/968 timeline. What I am reading though, is that pin 2 and pin 3 go to terminal 87 of the DME relay. Pin 7 goes to the "ignition lock terminal 50". If someone can verify that this pin is switched power, then we have our answer. All I know is that if I can make a harness without modifying whats already there, then I am a happy camper.
I will admit, I've seen threads about the 14 pin connector and how it went from providing everything to providing only wires for the oil pressure and temperature. The best thing you can do is actually test it. I think Porsche had the idea of "red and black stripe = accessory power". It seems like common sense to me.
robstah- Posts : 352
Join date : 2009-08-28
Age : 38
Location : Athens, GA
Re: Could someone check my plans for wiring the fuse block?
I already pulled the DME and have a relay for the fuel pump. The problem is telling which wires to splice into from under the fuse box. I don't want to butcher the wiring too much. If I can pull it out of the 14 pin harness it would be easier.
I need to hookup a battery and test the 14 pin harness.
I need to hookup a battery and test the 14 pin harness.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
Yes, toss the DME relay. All you need is a jumper on fuze #36 for the new PCM relay and splice into the fuel pump wire at the 14 pin connector.
xschop- Posts : 2711
Join date : 2009-06-09
Location : OKC
Re: Could someone check my plans for wiring the fuse block?
Alright, after looking through the wiring diagrams again, pin 7 is during cranking only. As mentioned above, the best bet is grabbing off of fuse 36.
robstah- Posts : 352
Join date : 2009-08-28
Age : 38
Location : Athens, GA
Re: Could someone check my plans for wiring the fuse block?
Thanks. The people who did it off the 14 pin harness must have kept the DME.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: Could someone check my plans for wiring the fuse block?
Also if you do keep the DME relay and have a factroy alarm, you could have problems down the road.
xschop- Posts : 2711
Join date : 2009-06-09
Location : OKC
Re: Could someone check my plans for wiring the fuse block?
Arthropraxis wrote:Thanks. The people who did it off the 14 pin harness must have kept the DME.
Nope... I pulled it. When you pull the DME it kills the power to the fuel pump (and what ever else it runs), so what you're basically doing is adding a relay to supply that wire with power once again.
spence- Posts : 684
Join date : 2009-07-21
Age : 41
Location : St.Catharines, Ontario, Canada
Re: Could someone check my plans for wiring the fuse block?
Right, I can use my relay to power the fuel pump. I won't be able to use the 14pin firewall harness to get switched power to my main relay for the motor harness because I pulled the DME. I will have to piggy back it on the radio fuse.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Page 1 of 2 • 1, 2
944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: Electrical Mods
Page 1 of 2
Permissions in this forum:
You cannot reply to topics in this forum
Today at 12:47 am by sharkey
» Ray's 1987 944 LS1 Build & Swap
Fri Mar 15, 2024 1:01 am by Raymond-P
» power steering pump
Thu Mar 14, 2024 10:28 pm by Rond948
» VATS Bypass/Delete
Thu Mar 14, 2024 8:38 pm by Rond948
» FS: Porsche 928 968 944 S2 951 Turbo FRONT BREMBO CALIPERS
Tue Mar 12, 2024 3:22 pm by dcoutofstep
» 944 S2/Turbo J LTD Edition Front Lip Spoiler - Brand New never fitted
Tue Mar 12, 2024 2:10 pm by dcoutofstep
» Adding Purge Solenoid Wiring to Standalone Harness
Tue Mar 12, 2024 12:12 pm by ndog52
» Crank no start no fuel pump prime
Fri Mar 08, 2024 9:07 pm by Rond948
» What coilover spring rates are you running with torsion bar removed?
Fri Mar 08, 2024 10:15 am by dcoutofstep
» 924 that has been modified already
Wed Feb 28, 2024 12:17 am by Gutterboy