factory fog lamp fuses?
03-10-2012 | 09:55 PM
#32
Seasoned Member
Joined: Feb 2012
Posts: 312
Likes: 0
From: Kentucky
Year: 2000
Model: Cherokee
Engine: 4.0
No. The relay has 4 contacts. Two are used to trigger the relay and the other 2 make a connection between the fuse feed and the fog lamps. The test consists of doing ohm or continuity testing. You have to apply battery power to activate the relay for further testing. It sound difficult but is fairly easy to do.
You can also check for voltage at the wire feed to the fog lamps. With the switch on you should have voltage at the lamps. If no contact is available you can stick a pin in the wire to get a reading then reseal the hole. If there is battery voltage at the lights the relay is working.
You can also check for voltage at the wire feed to the fog lamps. With the switch on you should have voltage at the lamps. If no contact is available you can stick a pin in the wire to get a reading then reseal the hole. If there is battery voltage at the lights the relay is working.
I am going to replace the lights themselves eventually, they are the rectangle blue lens kind you get at AutoZone. Made by something with a "P" as the first letter of the name. They clash with my red paint. I want some Sylvania's I think, the glass lens kind.
03-11-2012 | 10:12 AM
#33
Seasoned Member
Joined: Sep 2009
Posts: 454
Likes: 0
From: East Texas
Year: 1997
Model: Grand Cherokee
Engine: 4.0
Crazy Amos forgot to mention. The factory setup on the fog lights is that when you have the driving lamps in high beam, the fog lights turn off. Relay 1 provides this function. So make sure you test the fog lights with low beam.
Basically check fuse #25 see if it is good. Swap relay with known good one and see if lights work. If they do not test for battery voltage, should be around 12v, at the wire feed to the lamps. If there is power check to make sure you have a good ground for the lamps. If all checks good you may just have bad lamps.
Good luck.
Basically check fuse #25 see if it is good. Swap relay with known good one and see if lights work. If they do not test for battery voltage, should be around 12v, at the wire feed to the lamps. If there is power check to make sure you have a good ground for the lamps. If all checks good you may just have bad lamps.
Good luck.
03-11-2012 | 02:19 PM
#34
Thread Starter
Seasoned Member
Joined: Sep 2011
Posts: 298
Likes: 1
From: Winchester, VA
Year: 2000
Model: Cherokee
Engine: 4.0L I6
Crazy Amos forgot to mention. The factory setup on the fog lights is that when you have the driving lamps in high beam, the fog lights turn off. Relay 1 provides this function. So make sure you test the fog lights with low beam.
Basically check fuse #25 see if it is good. Swap relay with known good one and see if lights work. If they do not test for battery voltage, should be around 12v, at the wire feed to the lamps. If there is power check to make sure you have a good ground for the lamps. If all checks good you may just have bad lamps.
Good luck.
Basically check fuse #25 see if it is good. Swap relay with known good one and see if lights work. If they do not test for battery voltage, should be around 12v, at the wire feed to the lamps. If there is power check to make sure you have a good ground for the lamps. If all checks good you may just have bad lamps.
Good luck.
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