Air ride suspension relay

Tiny
UNCLEBIFF
  • MEMBER
  • 2001 LINCOLN NAVIGATOR
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
My rear end is setting almost all the way down on the tires and the pump is not coming on. I pulled off the relay only to find one of the terminals melted. What would cause this?
Thursday, February 28th, 2019 AT 7:13 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi and thanks for using 2CarPros.

In a plug like this, a few things can cause this. First, the pins in the plug corrode and become weak. The result is they can break. Or, the corrosion or a loose or weak connection can cause excessive heat which can result in this type of issue.

What I suggest is to replace the plug and use a dielectric grease on the pins. That will help reduce moisture damage and corrosion. Also, it will help maintain a good connection. You can get dielectric grease at most any parts store.

Let me know if you need help with anything.

Take care,
Joe
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Thursday, February 28th, 2019 AT 8:52 PM
Tiny
UNCLEBIFF
  • MEMBER
  • 37 POSTS
The plug was extremely tight hard to get apart. Could it still be moisture? Is there no other reason?
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Friday, March 1st, 2019 AT 12:26 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
It could also be related to a weak connection causing higher resistance in the wire. The result, it creates more heat. Also, it could simply be age. Remember, the plug moves a bit when the car is driven.

Let me know if I can help.

Joe
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Friday, March 1st, 2019 AT 7:25 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Hello,

If I can put my 2 cents in, When the air shocks/bags leak the pump runs excessively causing the overheating. I would replace the connector and the rear shocks here are diagrams to help. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Saturday, March 2nd, 2019 AT 11:54 AM

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