Gambi80 Posted January 20, 2010 Share Posted January 20, 2010 I had the center section of the dash out of my truck a while back and noticed there was wiring for the fog lights. Two questions... Is there power TO those wires and I can just install a switch? If so, where does the power end up if my truck wasn't originally equipped with fog lights (there's no fog light switch)...? I'm asking because I'd like to install additional lights and so forth and it'd be nice to have a seperate switch from the headlight/park light switch. This is in a 97 CH model...square dash. Quote Ever wonder how a blind person knows when to stop wiping? Link to comment https://www.bigmacktrucks.com/topic/12281-fog-light-hook-up/ Share on other sites More sharing options...
RowdyRebel Posted January 20, 2010 Share Posted January 20, 2010 Get one of these:Ground the clamp, and test the wires for juice...if it lights up, there's power running to them wires. There oughtta be a hot wire coming from the fuse panel (if there's a fuse...otherwise ya might need to insert one) and a wire or two that heads off towards the lights.I'd look for the wires for the lights up under the bumper somewhere. They may not be obvious...may have to search for 'em a bit...but I'd imagine they are up there somewhere. It's easier to wire all the trucks alike and add/subtract the various features as wanted by the purchaser, rather than to custom wire all the trucks differently depending on what options are spec'd.But of course all that is just a guess...don't assume I know what I'm talking about. I HATE dealing with electrical stuff...I usually just run a new circuit from the battery to make it easy on me instead of trying to find the "factory" wires.... Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/12281-fog-light-hook-up/#findComment-48042 Share on other sites More sharing options...
Mackpro Posted January 20, 2010 Share Posted January 20, 2010 I had the center section of the dash out of my truck a while back and noticed there was wiring for the fog lights. Two questions... Is there power TO those wires and I can just install a switch? If so, where does the power end up if my truck wasn't originally equipped with fog lights (there's no fog light switch)...? I'm asking because I'd like to install additional lights and so forth and it'd be nice to have a seperate switch from the headlight/park light switch. This is in a 97 CH model...square dash. You will need a fuse/breaker and a relay , they both go in the fuse panel. Plug in the factory switch and your ready. The wires should be behind the bumper or around the steering box. Best I remember you must have the headlights on for them to work and on some trucks they went out when you put the high beams on. All the older CH Mack cab wiring harnesses were the same regardless of options, so all the wiring is there, Quote Link to comment https://www.bigmacktrucks.com/topic/12281-fog-light-hook-up/#findComment-48044 Share on other sites More sharing options...
Gambi80 Posted January 20, 2010 Author Share Posted January 20, 2010 You will need a fuse/breaker and a relay , they both go in the fuse panel. Plug in the factory switch and your ready. The wires should be behind the bumper or around the steering box. Best I remember you must have the headlights on for them to work and on some trucks they went out when you put the high beams on. All the older CH Mack cab wiring harnesses were the same regardless of options, so all the wiring is there,Hey thanks. I figured as much, but didn't know how far the wiring went out. Now I get to sawzall the dash for the switch! Quote Ever wonder how a blind person knows when to stop wiping? Link to comment https://www.bigmacktrucks.com/topic/12281-fog-light-hook-up/#findComment-48047 Share on other sites More sharing options...
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