Fog Light Rewire

*95wolverine* · 09-27-2005, 12:01 PM

I know it's been discussed many many times and I've searched this through and through... and there is no easy fix.

All I want to do is have the fog lights come on with the parking lights.

I looked through the manual and realized the IPDM should have control over both the fog light relay as well as the tail lamp relay. The module simply provides ground for the coil on both relays.

My thought is to remove the relay covers and use a jumper wire to tie the coil grounds together. That way, if the parking light relay comes on, it also energizes the fog light relay. Once proven I can drill a small hole through the covers, pull the wire through, install relays and then tie them together.

The problem I am having is that both of these relays are supposed to be located in the IPDM, but the graphic detailing what relays are located where doesn't really jive with the schematics...

IE from the "Electrical Units" section (PG) page 24 shows the schematic. From that, I gather all the relays should be in the IPDM... but, if you take a gander at page 25 and 79, the "Tail lamp relay" and even the "Headlamp High Relay" don't exist. Does this mean that these relays aren't serviceable?

Hopefully I am missing the boat. Someone point me in the right direction.

Slurppie · 09-27-2005, 12:37 PM

Misery-Tom over on ClubT has a write up on how to do this with a simple jumper.

CMC#64 · 09-27-2005, 01:16 PM

Quote:

Originally Posted by Slurppie

Misery-Tom over on ClubT has a write up on how to do this with a simple jumper.

I read the write up at ClubT... it's a quick easy mod... however I wonder if this can't be done through the relay... on my Focus we removed the fog lamp relay and used a jumper to power the lamps when the fog lamp switch is turned on... this was you can turn it off and on as you want... with the ClubT you cannot turn off the fog lamps when the parking lamps are on (the fog switch is dead)..

All Wired · 09-27-2005, 01:22 PM

I haven't looked into my Titan for this fix yet, but what I did on my friend's 03 Frontier, was go to the actual fog light switch, there was two wires, one that supplied power from the headlights, and then the other was an output to the foglight relay.... I cut the headlight power feed at the switch and ran a parking light feed to the switch and it worked great. Once I check this out on my truck, I'll post on here letting you know how it went

*95wolverine* · 09-27-2005, 02:04 PM

Great Find on the CT forum, But... the problem I see with this is that the 10amp fuse originally designed to power the taillights is likely powered via a wire or bus originally intened for likely 20 amps (2x safety factor). Now if we add the potential 20amp draw from the fog lights, the load is now a potential 30 amps. Too much in my opinion.

With my approach, the module only sees double the load of the parking light relay.

I'll have to think on this some more.

Any other thoughts or suggestions?

KPierson · 10-25-2005, 10:36 PM

Why don't you just use the OEM switch to turn the foglights on and off with an external relay? Thats how my fogs are setup in my G35, I'm pretty sure they are identical systems

schneid · 10-26-2005, 07:37 AM

Just have the parking light circuit close a relay that feeds a fused circuit direct from the battery.

I did this but had to undo it, as my Silverstar fog bulbs, 893s, have the life span of a fruit fly.