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Electrical Headlights

  • Thread starter Thread starter jason865
  • Start date Start date Jan 17, 2021
J

jason865

Member
Feb 14, 2016
24
2
13
Jan 17, 2021
#1
  • Jan 17, 2021
  • #1
So I noticed last summer that my headlights shut off after about 30 minutes. Only happens with he fog lights on. I was thinking something with the headlight switch. Any thoughts? Any common issues? Thanks
 

dgollem

20+ Year Stangneter
May 5, 2004
210
32
49
Waldorf MD
Jan 17, 2021
#2
  • Jan 17, 2021
  • #2
There is a problem with the factorry fog lights drawing to much current through the headlight switch and the headlight switch overheating. There are several write ups on how to wire a relay in to fix the problem. Until you fix it it will only get worse and possible melt your headlight switch.
 
D

Deleted member 215073

Jan 17, 2021
#3
  • Jan 17, 2021
  • #3
What year is your car?
 
J

jason865

Member
Feb 14, 2016
24
2
13
Jan 17, 2021
#4
  • Jan 17, 2021
  • #4
JMGlasgow said:
What year is your car?
Click to expand...
1990 gt
 
D

Deleted member 215073

Jan 17, 2021
#5
  • Jan 17, 2021
  • #5
I thought Ford fixed that issue after 1989.
 
J

jason865

Member
Feb 14, 2016
24
2
13
Jan 17, 2021
#6
  • Jan 17, 2021
  • #6
JMGlasgow said:
I thought Ford fixed that issue after I had a missing
Click to expand...

JMGlasgow said:
I thought Ford fixed that issue after 1989.
Click to expand...
I had a missing fog light. I replaced it with a factory used fog light. Then I started using.the fog lights and notice the problem.
 
J

jason865

Member
Feb 14, 2016
24
2
13
Jan 17, 2021
#7
  • Jan 17, 2021
  • #7
jason865 said:
I had a missing fog light. I replaced it with a factory used fog light. Then I started using.the fog lights and notice the problem.
Click to expand...
I looked into the tsb and yes it was resolved before 1990. Could the issue just be in the headlight switch itself? By the look of the wiring diagrams i have there is a circuit breaker built into the switch
 
D

Deleted member 215073

Jan 17, 2021
#8
  • Jan 17, 2021
  • #8
If you read the TSB they want the headlight switch assembly, fog light switch, and connectors replaced if they're damaged. I think they also run a larger wire to the fog lights.

The circuit breaker is there so if the switch does overheat, it will self reset when it cools down and you get your lights back.
 
J

jason865

Member
Feb 14, 2016
24
2
13
Jan 17, 2021
#9
  • Jan 17, 2021
  • #9
JMGlasgow said:
If you read the TSB they want the headlight switch assembly, fog light switch, and connectors replaced if they're damaged. I think they also run a larger wire to the fog lights.

The circuit breaker is there so if the switch does overheat, it will self reset when it cools down and you get your lights back.
Click to expand...
Yeah thats whats happening. I'm going to check the wiring and switches make sure nothing is melted. With for lights on for 15 or 20 minutes the headlights will ahit off and a few minutes later they come back on. Leave fog lights off and no problem.
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,824
10,506
203
polk county florida
Jan 17, 2021
#10
  • Jan 17, 2021
  • #10
The fix:

Electrical - 92 GT Convertible - Fuse 13 Continuity Testing Question

Hey there, I have no interior dash lights, except the radio works and dome light and the exteriors are all good. Tried two dimmers, turned all the way down, fuse is good. Once I turn them up, no lights, hits "Dome Light on" and pops the fuse. So read I have to test the LB/R wire per the...
www.stangnet.com
I think it is about post #11?
 
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