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I have an 88' 5.0 LX and the turn signals won't work. The hazards and parking lights work just fine so i figure it must be the flasher unit under the dash. When i attempted to replace the flasher unit i couldn't find it anywhere and can't seem to trace it down (i did find the flasher unit for the hazard lights on the back of the fuse block under the dash)...could anyone just help me confirm where the location of the flasher unit is please, thanks.
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Going off of memory here- the 1988 Mustang still used a mechanical flasher unit- should look like a small round cylinder. Usually the flasher unit is located near one of the fuse panels- or plugged into the panel. It seems like you found it. It makes a nice clicking sound when operating.
If the hazards are flashing- I would assume that the flasher unit is fine.
There should be a fuse label TURN. Make sure it's not blown. If it is, it could mean there's another problem. If it's fine, continue below.
I would make sure that there's voltage leaving the turn signal switch, sometimes called a combination switch. Often times, if there's power for the brake lights, but nothing for the turn signals- this switch is to blame (the one located behind the steering wheel).
Isn't there one on the front of the fuse panel up in the corner? I'm too lazy to go out and look at my 88
If not the flasher, then it could be the multifunction switch in the column.
Vehicle: 1990 5.0 LX 7 UP and 2009 Premium Convertible
Location: Knoxville, TN and Biloxi, MS
Posts: 33
My 90 Mustang has the two flashers, and the one by the fuse panel was the emergency flashers. The turn signal flasher looks about the same but it was over close to the glove box under the dash. Not really easy to find, but with a flash light you should see it. Mine was bad; hope that helps!
Yeah I had the EXACT same problem with my 92 GT a few months ago. If your flasher is NOT by the fuse box it will be behind the glove box. Just open it up, pull the two tabs on the left and right inward....the box will drop down and the flasher is located on the left.
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1988 5.0 LX having trouble with turn signals
