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Broken Low beams on '88 5.0

  • Thread starter Thread starter ekobres
  • Start date Start date Jun 21, 2007
E

ekobres

New Member
Jun 21, 2007
1
0
0
Jun 21, 2007
#1
  • Jun 21, 2007
  • #1
My bro-in-law has an '88 with broken low beams.

It also appears there is some heat damage to the YelRed and RedBlk wires on the multi-switch, and to the connector on the back of the headlight switch.:damnit:

If I'm testing the HL switch correctly, it's working.
If I'm testing the Multi-switch correctly, it's working.
Flash-to-pass brights work okay.
Blinkers work okay.
Parking lights work okay.

So I have a few questions:

1. Can someone verify the order of the Yel/Red Red/Blk Lgn/Blk and DkBlu/Org wires on the multi-function switch?

2. Does anyone know the test procedure for the multi-switch (hi/low/pass part only) and headlight switch so I can confirm I'm metering the correct pins?

3. Does anyone have ideas on what could be wrong?

Bro admits some of the wires may have been plugged into the wrong place, as they fell out when he removed the switch from the steering column!

Thanks all.

EK.
 

Saleen0679

10 Year Member
Apr 14, 2005
876
24
49
Yakima, WA
Jun 22, 2007
#2
  • Jun 22, 2007
  • #2
If this is a GT it's a fairly common problem due to the foglights sharing the same circuit as the headlights. See the foglight fix.

The diagram should take care of your other questions. It sounds like the wires are in the correct order although the MF switch internal contacts might have gone bad.

 
Last edited: Feb 10, 2018

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Jun 22, 2007
#3
  • Jun 22, 2007
  • #3
Saleen's advice is impeccable as always.

As an addition thing to give a looksie and stress: I'd check the appropriate MF-switch terminal for low beams to see if it backed out of the connector shell. I had the Red/yellow wire do this - it was almost unnoticable - a wiggle test revealed it.

Good luck.
 
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