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 …

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Dual headlight motor conversion

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Dual headlight motor conversion

Post  golfduke on Tue Jun 09, 2009 10:58 am

As "borrowed" from the how-to. Written and performed by 948, although the pics seem to be disabled-

Here is a quick run down of how I performed a dual headlight motor conversion. You will need some basic hand and power tools. I picked up a driver side head light motor for a 1976 914.

Headlight motor and bar modifications.

1. Remove the headlight bar and cut off the rotating arms from each side of the bar. See the pic.
http://www.560sec.com/gallery/Other-misc-pics/DSCF0034

2. Clean up the passenger side rotating arm and put it aside. This is ready installation.

3. On the driver side rotating arm: Grind off the riveted ball. Make sure this is removed without enlarging the existing hole.

4. On the side where the ball used to be chamfer the hole a little. This chamfer should be enough so that the rotating arm can fit on the tapered shaft on the new driver side head light motor. This tapered shaft is knurled so that it can transfer torque much like those a windshield wiper arm. Test fit this on your head light motor.

5. Remove the plastic ball socket from the driver side L-bracket ready for modification.

6. Reinstall the L-bracket. Slide the new headlight motor into its new position. Now you can clock the motor to clear the coolant tank outlet. Mark the approximate location of 1 of the three mounting bosses. Remove and then scribe a line to the centre of the hole where the plastic ball socket used to be. Then make 2 other scribe lines at 120 degrees either side of the first. Measure the bolt circle of the three mounting bosses on the new head light motor. Drill the necessary holes to mount the new motor. See pic.
http://www.560sec.com/gallery/Other-misc-pics/Left_side_headlight_bracket_with_mounting_holes

7. Install the whole assembly.
http://www.560sec.com/gallery/Other-misc-pics/Left_head_light_Motor_installed

Electrical

14-16 gauge wire
Diode
Solder and Iron
Heat shrink
Tape

I used diodes to isolate the original motor from the new motor. Since each motor will run at different speeds each motors “+” trigger circuit can feed off each other. This will cause the faster motor to cycle twice….interesting but not desirable.

Following the diagram.
http://www.560sec.com/gallery/Other-misc-pics/Dual_Headlight_wiring

1. Hook up the 2 trigger wires and diodes as per the diagram. It does not matter which + trigger wire runs to the new motor.

2. Run the large red positive wire over to a switched source. Use at least a 16 gauge wire.

3. Run the ground to the chassis.

This should be enough to get it done. You will have to play with the alignment and clocked position of the arm. I painted the whole motor with semi-gloss paint.

Here is a video of my set-up in operation.
http://www.560sec.com/albums/Other-misc-pics/Dual_headlight_1.wmv
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dual headlight motors--wiring

Post  944-v8 on Sat Jun 26, 2010 11:29 pm

Anyone that has done this mod. I have the mechanical part done. Now the wiring. Did you just put the diodes in series at the connector on the main motor. Did you use simple 1 amp diodes like 1n4148 or something different?
Thanks:

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Re: Dual headlight motor conversion

Post  948 on Mon Jun 28, 2010 6:53 am

I ran them in parallel. I don't recall the size of diodes, but they were the largest radio shack had.
If you look over on porschehybrids, in my gallery, you will see a diagram for the wiring. If you search that board you will also find details on the diode, IIRC.
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Re: Dual headlight motor conversion

Post  944-v8 on Mon Jun 28, 2010 1:54 pm

Thanks Paul: I misinterpreted the drawing. The explanation cleared that up.

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Re: Dual headlight motor conversion

Post  docwyte on Mon Jan 17, 2011 10:31 am

Anyone have this whole write up with pictures and wiring diagram?

I'm thinking about doing it to get rid of the headlight bar as it's causing me all sorts of headaches with trying to fit my intake setup...

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Re: Dual headlight motor conversion

Post  948 on Mon Jan 17, 2011 11:15 am

http://www.porschehybrids.com/gallery/Other-misc-pics
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Re: Dual headlight motor conversion

Post  laptop_geek on Mon Jan 17, 2011 2:58 pm

What about taking the bar and mounting two gears on each side of it? Then one would be able to move the bar to wherever it would work most effective. This would eliminate the need for all that darn electrical work and still keep everything simple (and probably a little lighter than using two motors). I can draw something up if anyone wants a better picture of what I'm talking about.
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Re: Dual headlight motor conversion

Post  docwyte on Sun Nov 27, 2011 1:42 pm

Bringing this back from the dead. Does anyone have this saved with all the pictures and wiring diagrams?
Thinking this would make a nice winter project.

TIA!

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Re: Dual headlight motor conversion

Post  87-944S on Sun Nov 27, 2011 4:20 pm

I'm planning on using a set of 914 headlight motors, until I finish my custom lights. I've been in contact with 948, I'm hoping to get the DIMs he posted on the old board, and along with the instructons in this thread I should be good to go. Will post as things progress.
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Re: Dual headlight motor conversion

Post  948 on Tue Nov 29, 2011 6:43 pm

Here you go. Cool




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Re: Dual headlight motor conversion

Post  87-944S on Tue Nov 29, 2011 6:56 pm

Paul,

You are the best! Thanks!
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Re: Dual headlight motor conversion

Post  spence on Wed Nov 30, 2011 6:04 am

I would love to get rid of that bar!! Does the second motor not require a relay? How much can you get a set of 914 motors for?
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Re: Dual headlight motor conversion

Post  87-944S on Wed Nov 30, 2011 1:34 pm

I picked up a pair of motors off Craigslist for 30 bucks. 914 motors are smaller that 944 ones, as for another relay, not sure, haven't gotten that far yet.
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Re: Dual headlight motor conversion

Post  pormgb on Wed Nov 30, 2011 5:53 pm

I spent the whole summer trying to figure out how to keep my pop up headlights!! bought my 914 left motor on Ebay this morning.

Thanks for sharing this solution!!
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Re: Dual headlight motor conversion

Post  948 on Wed Nov 30, 2011 8:40 pm

spence wrote:Does the second motor not require a relay?
The motor should come with its own relay. This relay is in the wiring harness not on the motor housing like the stock 944 motor.
I picked mine up for about $30, eBay I think.
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Re: Dual headlight motor conversion

Post  docwyte on Thu Dec 01, 2011 9:26 am

Thanks for posting that Paul! I just ordered a left headlight motor from eBay, $30 shipped. Once I finish off the rest of the "to do" list on the car I'll tinker with this.

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Re: Dual headlight motor conversion

Post  aixgelo78 on Sat Jan 28, 2012 9:51 pm

So I have all the mechanicals ready and I'm trying to figure out the wiring end.

Im usually pretty good with wiring, but for some reason, I have not had any luck. I bought another 914 motor to acquire it's relay and to have a spare motor. I am bench testing it with a battery and I am having no luck getting the thing to move. The only time I get some sort of reaction is when I place the ground wire to negative and contact the Grn/Blk wire. I then hear the round relay change state. I metered out the relay and it works as it should, but the motor does not move. I then try my other 914 motor that is already installed in the car, but the only time I get any reaction is when I energize the gray wire. Still, no movement on the motor. I already blew a fuse and dont want to make any unnecessary damage to a relay or fuse....

Could any of you guys chime in who already has done this...



TIA
Chris

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Re: Dual headlight motor conversion

Post  948 on Sun Jan 29, 2012 8:24 am

IIRC, how to bench test:
Run constant 12+ to the large red wire and 12- to the grounds. Take another 12+ and touch either of the trigger wires; switch between the trigger wires to activate each phase.... Hope that works
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Re: Dual headlight motor conversion

Post  aixgelo78 on Sun Jan 29, 2012 11:41 am

948 wrote:IIRC, how to bench test:
Run constant 12+ to the large red wire and 12- to the grounds. Take another 12+ and touch either of the trigger wires; switch between the trigger wires to activate each phase.... Hope that works

I bench tested it, It worked!!!!

Thanks a lot!!!
Chris

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Re: Dual headlight motor conversion

Post  docwyte on Sun Jan 29, 2012 2:53 pm

Chris, let me know when you have this done, it's the next project on my car...

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Re: Dual headlight motor conversion

Post  aixgelo78 on Sun Jan 29, 2012 3:15 pm

docwyte wrote:Chris, let me know when you have this done, it's the next project on my car...

Will do. The hardware is done, I just need to wire it in. Let me know when u are ready.

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Re: Dual headlight motor conversion

Post  docwyte on Sun Jan 29, 2012 5:09 pm

What did you do hardware wise? How hard was it to locate the motor and drill those three holes? How do you remove the stock head light bar?

I'm really interested in how you end up wiring it up and getting the 914 motor to cycle properly...

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This is my install:

Post  aixgelo78 on Sat Apr 07, 2012 7:28 pm


Doc, sorry for the delay, but here is my install

Note: I tried to install a diode, but it still was flipping twice. I installed diodes between all the wires.

-the electrical tape is temporary

Wire C is constant power. It is connected to the thicker red w/green stripe wire.

Wire A and B are trigger wires. they are the wire on the ends of the connector. I forgot which one was up and which one was down. IIRC the one with voltage while the headlight is down is the trigger down.

I tapped power from the original 4 wire harness.












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Re: Dual headlight motor conversion

Post  Jasonscottw on Fri Nov 14, 2014 5:34 pm

Ok, so I have the whole 914 headlight conversion ready to wire and I have a question-
One of the headlight units is missing the round black relay that plugs into the headlight assembly.
Just to verify, each headlight requires it's own relay? Thanks for the help-
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Re: Dual headlight motor conversion

Post  docwyte on Fri Nov 14, 2014 5:36 pm

Yes, you need a relay there. I actually replaced that circular relay with a modern Bosch relay, that way I can easily replace it if need be

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Re: Dual headlight motor conversion

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