Hello everyone,
I have a newish (to me) 2001 SR5 that I've been working on for the last several months. I'm trying to get my fog lights working but am at a road block and need some advice. My rig has the Hella Micro DE lights that were originally corroded to hell and replaced with new replacement units and bulbs. From what I can tell, I'm not sure that my rig originally came with fogs as I don't have a switch on the turn stalk like others have reported, rather I have a switch in the dash.
So, I know that the lights are only supposed to come on when the low beams are on and they turn off otherwise. My question to you all is, I cannot for the life of me get them to turn on. Can anyone offer any advice on what to do next? Here's what I've done:
1) Checked fuse under hood, fuse is fine. Also swapped with a different, known-good fuse and still no luck.
2) Checked the relay and I believe it also works (passes click test). The relay config looks as follows:
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If I apply 12v to uppermost and lowermost horizontal pins, the relay clicks.
3) I used a DMM to check the current using advice from
this thread and found the following:
a) When car is OFF (no keys in), I have constant 12v between the two vertical pins on the right. This doesn't change, except for jumping up to 14v when car is running. Lights on/off it doesn't matter, always 12v here. At any time, I can put a jumper wire between these two and the fog lights will turn on. Even with car off, keys out of the ignition.
b) I ONLY have 12v between uppermost and bottom most horizontal pins with low beams ON and fog light switch ON. When I turn fog light switch off or turn on high beams, 12v goes to zero (as intended, I believe).
I've verified continuity with my DMM between one of the rightmost vertical pins (can't remember whether it was the left or right one atm) and both connectors that plug into the fog lights under the bumper. I also have continuity from the battery ground and the ground on both connectors at each of the fog lights. And again, when I jump the vertical pins, the lights turn on with and without the vehicle running, so I know that continuity and my connections are good.
4) I've also tried switching the relay with the one used for the Defrost and still no luck getting them to turn on.
I'm at a loss and not really sure how to proceed. I know the switch works as I can see measurable voltage changes in the horizontal pins when the switch is flipped. I suspect that the relay is working because it does pass the click test and subbing in a different relay doesn't change anything. And, I know I have continuity in my wiring and that my lights work as I can bypass the circuit and manually power them with 12v.
Anyone have any suggestions on how I should proceed?
