Electrical Foxbody Dash & Hazard lights not working

[sjmcr]

I have an 88 LX. My headlights and blinkers work but I have no hazard lights. The hazard switch connector is new, as well as the flasher and the fuses are all good. I also have zero dash illumination. I’ve changed the dinner switch, headlight switch connector, even the bulbs inside the instrument cluster. I’m not sure what else to check from this point. Anyone else have this problem?

 

[sjmcr]

I have an 88 LX. My headlights and blinkers work but I have no hazard lights. The hazard switch connector is new, as well as the flasher and the fuses are all good. I also have zero dash illumination. I’ve changed the dinner switch, headlight switch connector, even the bulbs inside the instrument cluster. I’m not sure what else to check from this point. Anyone else have this problem? Update. I took my stereo out and now the dash lights come on, but only when the dimmer switch is turned all the way on. Still no hazard lights though.

 

[General karthief]

Take a test light and check fuse for the stuff that don't work.
How long have you owned this?
Any wiring modifications?

 

[88Fox5.0LX]

I have an 88 LX. My headlights and blinkers work but I have no hazard lights. The hazard switch connector is new, as well as the flasher and the fuses are all good. I also have zero dash illumination. I’ve changed the dinner switch, headlight switch connector, even the bulbs inside the instrument cluster. I’m not sure what else to check from this point. Anyone else have this problem?

Replace the relay.

 

[sjmcr]

Take a test light and check fuse for the stuff that don't work.
How long have you owned this?
Any wiring modifications?

I’ve owned it for 4 years. No wiring modification that I’m aware of as the car has been in my family.

 

[AeroCoupe]

EVTM for your '88 is here curtesy of @Mustang5L5:

Reference Thread '1988 Mustang EVTM'

Jan 18, 2024

Mustang5L5 submitted a new resource:

1988 Mustang EVTM - Electrical and vacuum troubleshooting manual

1988 Mustang EVTM

SImilar to 1987 and 1989 with minor differences in engine harness. Most non-engine related stuff is identical, such as power windows, HVAC, defrost, etc.

Read more about this resource...

• Mustang5L5
• Replies: 2
• Forum: Resource Discussion Forum

 

[Mindseye007]

I have an 88 LX. My headlights and blinkers work but I have no hazard lights. The hazard switch connector is new, as well as the flasher and the fuses are all good. I also have zero dash illumination. I’ve changed the dinner switch, headlight switch connector, even the bulbs inside the instrument cluster. I’m not sure what else to check from this point. Anyone else have this problem?

Did you make sure the dimmer switch was turned all the way up. Does the interior light work?

Have you checked your ignition switch?

Mustang Ignition Switch (79-93) - LMR.com

1979-93 Ford Mustang ignition switch replacement will get your Mustang starting again!

lmr.com

View: https://youtu.be/i3ZR9ign2bI?feature=shared


You might need this...

https://lmr.com/item/LRS-10843B/1987-1989-mustang-primary-instrument-cluster-circuit-board

With this

https://lmr.com/item/LRS-10843C/1987-1989-mustang-secondary-instrument-cluster-circuit-board

View: https://youtu.be/cZmyqrTrc0w?feature=shared