2002 fog light issues
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Senior Member
Joined: Mar 1999
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From: Southwestern, Virginia USA
2002 fog light issues
Ok, I did a search and came up with nothing that helps. Yesterday I went to use my fog lamps on my 2002 SCrew and they didn't work.
-When I pull the switch on the inside to activate the fog lamps the indicator for the fog lamp shows they're on, it lights up even though the fog lamps aren't working.
-I checked the fusebox inside the truck and that fuse is good.
-I checked the relay and the fuse in the battery junction box under the hood and both appear to be fine.
-When I turn the fog lamps on and off with the switch I can hear the relay in the battery junction box click on and off as the switch does.
-I checked the bulbs and they aren't blown.
I haven't done any mods to the the lights or the switch. Are there any other fuses inline or otherwise that need to be checked that aren't listed in the owners manual? I don't have a meter to check for power. Thanks in advance for any ideas.....
-When I pull the switch on the inside to activate the fog lamps the indicator for the fog lamp shows they're on, it lights up even though the fog lamps aren't working.
-I checked the fusebox inside the truck and that fuse is good.
-I checked the relay and the fuse in the battery junction box under the hood and both appear to be fine.
-When I turn the fog lamps on and off with the switch I can hear the relay in the battery junction box click on and off as the switch does.
-I checked the bulbs and they aren't blown.
I haven't done any mods to the the lights or the switch. Are there any other fuses inline or otherwise that need to be checked that aren't listed in the owners manual? I don't have a meter to check for power. Thanks in advance for any ideas.....
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Joined: Jul 2004
Posts: 6,200
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From: Easton, Pa.
You have to meter the leads, test the fuse/ relay/ feed, or use a test light to come to a decision on the fault..
Try subbing the relay by swapping with another.
The lead color code should be tan/orange from the relay to the lamps but that color code is not always correct.
Try subbing the relay by swapping with another.
The lead color code should be tan/orange from the relay to the lamps but that color code is not always correct.
Thread Starter
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Senior Member
Joined: Mar 1999
Posts: 104
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From: Southwestern, Virginia USA
I had already swapped the fuses in both the BJB and the fuse box with new fuses just to be sure. I also took a relay that I knew was working properly and swapped it out with the fog lamp relay. I should have explained how I knew those were all ok. I suppose I need to get a meter to check and see if power is getting to the lights themselves. Like I said in the first post, I can hear the relay clicking in the BJB when I turn the fog lights on and off at the switch. So it sounds like it's getting power to the relay. Thanks, Patrick.
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Joined: Jun 2002
Posts: 10,511
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From: Under the flightpath of old ORD 22R
1. Do you have DRLs installed from the factory ?
2. When you pull the relay from the BJB and short pins 3 & 5, do the fog lamps work ?
This will test from BJB Fuse # 9 to the fog lamps, sans relay and switch.
The Fog lamp icon on the main headlamp switch indicates that the CJB fuse # 27 is good, along with the ground to the main headlamp switch pin # 6, which should indicate that the output on the yellow wire on pin # 5, to the fog lamp relay pin #1 power to relay coil has power ( the click on the BJB Fog Lamp Relay ).
If the fog lamps do not illuminate when you short pins 3 & 5 ( look at the relay for the pin assignments ) the problem is from BJB Fuse #9 to the fog lamps or the ground on the fog lamp connectors. BTW : the truck does not need to be in the run position for the test to work, BJB Fuse # 9 is hot at all times.
Let us know what happens.
2. When you pull the relay from the BJB and short pins 3 & 5, do the fog lamps work ?
This will test from BJB Fuse # 9 to the fog lamps, sans relay and switch.
The Fog lamp icon on the main headlamp switch indicates that the CJB fuse # 27 is good, along with the ground to the main headlamp switch pin # 6, which should indicate that the output on the yellow wire on pin # 5, to the fog lamp relay pin #1 power to relay coil has power ( the click on the BJB Fog Lamp Relay ).
If the fog lamps do not illuminate when you short pins 3 & 5 ( look at the relay for the pin assignments ) the problem is from BJB Fuse #9 to the fog lamps or the ground on the fog lamp connectors. BTW : the truck does not need to be in the run position for the test to work, BJB Fuse # 9 is hot at all times.
Let us know what happens.