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1987 Mercury Marquis Electrical Glitch

Tiny
CHASHIPP
  • MEMBER
  • 1987 MERCURY MARQUIS
  • V8
  • 2WD
  • AUTOMATIC
  • 45,000 MILES
I am having an electrical problem with my 87 Grand Marquis. When I step on the brakes, hit the turn signal, use the windsheild wipers, or sometimes when I don't do anything at all my interior lights flicker, the radio goes off and on, the clock on the dash flickers on and off, and even the headlights can dim way down. I don't want to start dumping money into the car blindly. Any thoughts? Alternator? Regulator? Bad Wiring?
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Tuesday, February 26th, 2008 AT 11:27 PM

3 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Remove the negative battery cable, then go under the dash and pull the fuse panel out, see if there are any fried wires in the back side of it, repair any found, then make sure it all goes back together good and tight. Also check the small ground wire on the neg terminal at battery cable.
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Wednesday, February 27th, 2008 AT 8:40 AM
Tiny
CHASHIPP
  • MEMBER
  • 2 POSTS
Ok, I checked the backside of the fuse panel and there are no fried or damaged wires. Also, the negative battery cable is very solid and making good connections. Any other ideas?

Thanks!
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Tuesday, March 4th, 2008 AT 2:00 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Do the same thing under the hood, at the power distribution center, leave that neg cable off!
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Tuesday, March 4th, 2008 AT 3:28 PM

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