944Hybrids: 924/944/968 and 928 V8 Conversions
Would you like to react to this message? Create an account in a few clicks or log in to continue.
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

Latest topics
» LS Overheating Issue
914 headlight motor issues EmptyYesterday at 3:39 pm by porvette101

» 944 na auto sbc
914 headlight motor issues EmptyYesterday at 11:07 am by stu wright

» 951 Full Race Car LS swap. Plus a million custom items.
914 headlight motor issues EmptySun Jun 20, 2021 12:52 pm by 95ONE

» more pics of the car
914 headlight motor issues EmptySun Jun 20, 2021 12:47 pm by 95ONE

» Ray's 1987 944 LS1 Build & Swap
914 headlight motor issues EmptySun Jun 20, 2021 12:35 am by Raymond-P

» bellhousing pressure plate interference
914 headlight motor issues EmptySat Jun 19, 2021 1:23 pm by 9turbo51

» Tips For Mating The Engine To Torque Tube?
914 headlight motor issues EmptyFri Jun 18, 2021 8:06 pm by Raymond-P

» ECU Wiring
914 headlight motor issues EmptyTue Jun 15, 2021 9:47 am by Hotrodz of Dallas

» wtb: 16" early offset wheels
914 headlight motor issues EmptySun Jun 13, 2021 1:17 am by sharkey

» WTB 951 or S2 Trans
914 headlight motor issues EmptyFri Jun 11, 2021 4:13 pm by Rikstone

June 2021
MonTueWedThuFriSatSun
 123456
78910111213
14151617181920
21222324252627
282930    

Calendar Calendar

Log in

I forgot my password

914 headlight motor issues

Go down

914 headlight motor issues Empty 914 headlight motor issues

Post  948inVA Sat Sep 22, 2012 2:06 pm

Has anyone been able to get the 914 headlight motors working properly? I have mine installed and wired up similar to the 914 wiring schematics (2 diodes on each exciter wire up/down, wired in parallel). Problem is, they worked fine when I tested them with the engine off but if I try to turn them on after driving the car for a bit they just cycle repeatedly. I initially had only 2 diodes, then added the other 2 and get the same behavior. Not sure if it's due to the higher voltage with the alternator running or the heat of the engine bay. Any ideas?
948inVA
948inVA

Posts : 222
Join date : 2012-01-01
Location : n. virginia

Back to top Go down

914 headlight motor issues Empty Re: 914 headlight motor issues

Post  948inVA Sun Sep 23, 2012 10:05 am

They seem to work normally again after the engine has cooled down. Could it be a bad ground or an issue with the motor?
948inVA
948inVA

Posts : 222
Join date : 2012-01-01
Location : n. virginia

Back to top Go down

914 headlight motor issues Empty Re: 914 headlight motor issues

Post  87-944S Sun Sep 23, 2012 4:11 pm

Cooled down and engine off? Have you measured the charging voltage?
87-944S
87-944S

Posts : 744
Join date : 2009-06-10
Location : Maryland

Back to top Go down

914 headlight motor issues Empty Re: 914 headlight motor issues

Post  944-LT1 Sun Sep 23, 2012 10:00 pm

[You must be registered and logged in to see this link.]


"To ensure that the motor does not overshoot the fully raised or stowed position of the headlight mechanism, the relay pin 87a is connected to ground. This puts a short across the motor when it is de-energized. A permanent magnet motor (which these are) can also act as a generator, and if it’s output is shorted, it is equivalent to putting on a very effective electric brake."


_________________
[You must be registered and logged in to see this image.]

[You must be registered and logged in to see this link.]
944-LT1
944-LT1
Moderator
Moderator

Posts : 1263
Join date : 2009-06-09
Age : 99
Location : NOTRE DAME

Back to top Go down

914 headlight motor issues Empty Re: 914 headlight motor issues

Post  948inVA Mon Sep 24, 2012 8:09 am

I do have 87a going to ground, I'll have to double check its a solid connection. I just remembered that the pin for my ground wire on the passenger side motor was a little mangled, so that might be the culprit too.
948inVA
948inVA

Posts : 222
Join date : 2012-01-01
Location : n. virginia

Back to top Go down

914 headlight motor issues Empty Re: 914 headlight motor issues

Post  948inVA Mon Sep 24, 2012 9:40 pm

Ok, think I've got it sorted out now. I redid the ground wire on the 914 motor and tied it into the factory ground point behind the headlight. Took it for a drive tonight and the lights worked properly, even after the engine was warmed up!
948inVA
948inVA

Posts : 222
Join date : 2012-01-01
Location : n. virginia

Back to top Go down

914 headlight motor issues Empty Re: 914 headlight motor issues

Post  944-LT1 Mon Sep 24, 2012 10:01 pm

[You must be registered and logged in to see this image.]

_________________
[You must be registered and logged in to see this image.]

[You must be registered and logged in to see this link.]
944-LT1
944-LT1
Moderator
Moderator

Posts : 1263
Join date : 2009-06-09
Age : 99
Location : NOTRE DAME

Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum