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Please, help me diagnose my turn signal / frt lamps by 85LAMB
Started on: 12-23-2014 08:35 PM
Replies: 6 (134 views)
Last post by: Paul.S on 12-27-2014 07:50 PM
85LAMB
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Report this Post12-23-2014 08:35 PM Click Here to See the Profile for 85LAMBClick Here to Email 85LAMBSend a Private Message to 85LAMBEdit/Delete MessageReply w/QuoteDirect Link to This Post
Hey guys
I am working on a 88 Formula
the car had been sitting for some time.

when I first turn on the park lamps the front ones would not work at all.
I change out the bulb on one of them and it was not the bulb.
None of the frt lamps would work w/ the exception of the headlamps.


2 days later I turned on the lamps again.
This time all the lamps turn on.

But as soon as I tried to turn on the turn signal lamps...
the frt sidemarker lamps n turn signal/park lamps turn off. ?!?!?!?!
and the turn signal indicator stays lid solid.

- With the lights turn off:
The turn signals stay lid solid but would not blink.

Any suggestions .....
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Gall757
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Report this Post12-23-2014 09:57 PM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
The front park lamps are double filament bulbs. Sometimes they fail and ground the other filament.....sometimes they don't contact the socket properly. Remove both bulbs and clean the sockets, making sure the contacts in the bottom are good (they are spring loaded and sometimes get hung up).

Also, go to the Ogre's cave and read about Sneak Path.

http://home.comcast.net/~fierocave/sneakpath.htm

[This message has been edited by Gall757 (edited 12-23-2014).]

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countach711
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Report this Post12-24-2014 12:30 AM Click Here to See the Profile for countach711Click Here to visit countach711's HomePageClick Here to Email countach711Send a Private Message to countach711Edit/Delete MessageReply w/QuoteDirect Link to This Post
I just had issues with my running lights not working so I took out the headlight switch and sprayed inside it with electrical contact cleaner as well as the plug and connector, switched it on and off a few times and it works great now!
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85LAMB
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Report this Post12-24-2014 05:19 PM Click Here to See the Profile for 85LAMBClick Here to Email 85LAMBSend a Private Message to 85LAMBEdit/Delete MessageReply w/QuoteDirect Link to This Post
Thanks for the tips
I will try them and see if that takes care of the issues.
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f85gtron
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Report this Post12-25-2014 07:03 PM Click Here to See the Profile for f85gtronSend a Private Message to f85gtronEdit/Delete MessageReply w/QuoteDirect Link to This Post
First thing is to check the contacts on the forward facing lights in the bumper. They bend, get weak and corrode. When the contact go bad, the side markers and turn signals don't have a ground return path because the front signals' circuit doesn't collapse. ....or something like that.....
Ron
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rogergarrison
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Report this Post12-27-2014 03:52 PM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonEdit/Delete MessageReply w/QuoteDirect Link to This Post
Broken or corroded grounds always seem to be the biggest source of problems on Fieros/ Corvettes because on non metal body panels...ESPECIALLY if they worked before and don't after an extended storage.

[This message has been edited by rogergarrison (edited 12-27-2014).]

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Paul.S
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Report this Post12-27-2014 07:50 PM Click Here to See the Profile for Paul.SSend a Private Message to Paul.SEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by 85LAMB:

2 days later I turned on the lamps again.
This time all the lamps turn on.

But as soon as I tried to turn on the turn signal lamps...
the frt sidemarker lamps n turn signal/park lamps turn off. ?!?!?!?!
and the turn signal indicator stays lid solid.

- With the lights turn off:
The turn signals stay lid solid but would not blink.

Different things work at different times but not all together? That screams ground problem. Test ground at bulbs for resistance to known good ground. Should be zero. If not trace back and clean all connections till it is. -Paul

------------------
1988 Fiero Formula 25k miles, garaged since 1988

[This message has been edited by Paul.S (edited 12-27-2014).]

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