• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Electrical Intermittent turn signals

  • Thread starter Thread starter f8tlfiveo
  • Start date Start date Nov 29, 2012

f8tlfiveo

My wife likes my spool and blow-off valve.
Aug 8, 2007
1,585
102
64
Lancaster, PA
Nov 29, 2012
#1
  • Nov 29, 2012
  • #1
I have been having trouble with my turn signals.. One day they work, the next day they do not. Anyone have this happen before? I have not looked into the issue yet but am getting annoyed with it.
 
B

blackcrystal90

Member
Oct 30, 2011
45
0
6
Nov 29, 2012
#2
  • Nov 29, 2012
  • #2
i had this happen to me one but in my case the relay under the dash was kinda loose. they didnt work since i got the car and one day i moved it and check my signals and worked. then two weeks later the relay went out and bough a new one.and havent had issues since. hope this helps.
 

f8tlfiveo

My wife likes my spool and blow-off valve.
Aug 8, 2007
1,585
102
64
Lancaster, PA
Nov 29, 2012
#3
  • Nov 29, 2012
  • #3
Ok.. This sounds like something that could be causing my problem. Where is the relay located?
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
Nov 30, 2012
#4
  • Nov 30, 2012
  • #4
The location varies. It's best to get it work, turn it on and listen for it.

Keep an eye out for the HVAC blower, radio, wipers, etc not functioning at all times (when they should). The TS's, along with any of those, can indicate that the ignition switch is going south.
 

f8tlfiveo

My wife likes my spool and blow-off valve.
Aug 8, 2007
1,585
102
64
Lancaster, PA
Nov 30, 2012
#5
  • Nov 30, 2012
  • #5
Never had a problem with the other stuff. Just the turn signals
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
Dublin GA
Nov 30, 2012
#6
  • Nov 30, 2012
  • #6
It’s time for an Easter egg hunt…

The turn signal flasher is not mounted on the front of the fuse panel. The flasher on the front of the fuse panel is a separate one for the hazard lights. The turn signal flasher is in one of several places, depending on when your car was made. Some are behind the fuse panel on the back side, others are behind the radio and some are behind the glove box.

Other possible problem sources for the turn signal malfunction are the ignition switch, multifunction switch and the plastic shell that holds the turn signal wiring connector pins.

A word of caution about multifunction switches is in order here. The multifunction switch (high/low beam, wiper, turn signals) are different for different years. 87-89 will work in any 87-89 car. The 90-93 switches only work in 90-93 cars. You can't put an early model switch in a late model car, nor can you put a late model switch in an early car.

Supposedly you can move the pins around to make the switches work in model years that are different from the car the switch came out of. I cannot verify that and haven’t tried it .

The following diagram is for 87-89 model cars.

Turn signal switch wiring:
 

bird_dog0347

still married haven't seen testicles in years
15 Year Member
Jun 7, 2012
2,298
2,026
174
Little Elm, TX
Nov 30, 2012
#7
  • Nov 30, 2012
  • #7
Also pull your hazzard switch from the dash bezel and make sure the orange wire is snug in the back of the switch. I had a similar issue and after replacing BOTH the flasher and the hazzard relay's I found that orange wire to be loose. Blinkers work now that I pushed it back in.
 
You must log in or register to reply here.

Similar threads

Electrical 1986 Mustang GT Multifunction Switch Question
  • Willybill32
  • Oct 26, 2025
  • Fox 5.0 Mustang Tech
Replies
11
Views
428
Fox 5.0 Mustang Tech Nov 22, 2025
Willybill32
68 horn and turn signals stopped working
  • connella08
  • Sep 10, 2025
  • Classic Mustang Specific Tech
Replies
1
Views
268
Classic Mustang Specific Tech Sep 10, 2025
Noobz347
1
Electrical Headlight harness trouble
  • 1985fox
  • Apr 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
200
Fox 5.0 Mustang Tech Apr 17, 2026
AeroCoupe
A
1966 Mustang coupe / Brake lights and left rear turn signal not working.
  • ArizonaRob1966
  • Nov 3, 2025
  • Classic Mustang Specific Tech
Replies
2
Views
315
Classic Mustang Specific Tech Dec 24, 2025
Mcmahst
7
70 Mach 1 Turn Signal Indicator light issue,
  • 70 Mach
  • Oct 19, 2025
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
1
Views
204
1965 - 1973 Classic Mustangs -General/Talk- Nov 25, 2025
Mach1 Driver
M
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?