phenryiv1 Posted February 25, 2009 Posted February 25, 2009 I have a factory fog light switch from an early-90's XJ. I want to use it to control aftermarket fog lights in my 88 MJ. Does anoyone have the wire codes for the 4 wires in the pigtail that comes to/from the switch?
phenryiv1 Posted February 25, 2009 Author Posted February 25, 2009 I have a factory fog light switch from an early-90's XJ. I want to use it to control aftermarket fog lights in my 88 MJ. Does anoyone have the wire codes for the 4 wires in the pigtail that comes to/from the switch? I suck at the internet... http://www.jeepforum.com/forum/showpost ... ostcount=1 Image Not Found
HOrnbrod Posted February 25, 2009 Posted February 25, 2009 I have a factory fog light switch from an early-90's XJ. I want to use it to control aftermarket fog lights in my 88 MJ. Does anoyone have the wire codes for the 4 wires in the pigtail that comes to/from the switch? Shoot me a PM with an email address and can send you a wiring diagram with which you can use your existing factory wiring from the switch to the forward bulkhead connector. All you have to do is add a relay and wite to the lights from it.
phenryiv1 Posted February 25, 2009 Author Posted February 25, 2009 I have a factory fog light switch from an early-90's XJ. I want to use it to control aftermarket fog lights in my 88 MJ. Does anoyone have the wire codes for the 4 wires in the pigtail that comes to/from the switch? Shoot me a PM with an email address and can send you a wiring diagram with which you can use your existing factory wiring from the switch to the forward bulkhead connector. All you have to do is add a relay and wite to the lights from it. Thanks!
jtdesigns Posted February 25, 2009 Posted February 25, 2009 I have a factory fog light switch from an early-90's XJ. I want to use it to control aftermarket fog lights in my 88 MJ. Does anoyone have the wire codes for the 4 wires in the pigtail that comes to/from the switch? Shoot me a PM with an email address and can send you a wiring diagram with which you can use your existing factory wiring from the switch to the forward bulkhead connector. All you have to do is add a relay and wite to the lights from it. Hey Don,, do you know if all the wiring is there from the bulkhead to the connector under the airbox? I have the switch wiring for the switch in the dash (on my 96) and got a headlight harness that had the relay and fog light connectors in it. I tried to chase wires with my meter but couldnt find any matching.. Just wondering.. I was hoping like most things on these Jeeps if I could luck out and have it plug 'n' play...
HOrnbrod Posted February 25, 2009 Posted February 25, 2009 The wiring is there from the dash switch cavity to the 10-pin connector up near the front bulkhead. If you didn't have factory fogs, the wiring ends at that connector. But at least you can use that part. :D
jtdesigns Posted February 26, 2009 Posted February 26, 2009 The wiring is there from the dash switch cavity to the 10-pin connector up near the front bulkhead. If you didn't have factory fogs, the wiring ends at that connector. But at least you can use that part. :D 10 pin connector, up near the front bulkhead = under the air box right, under the egr solenoid right?? Just want to make sure.. :D
HOrnbrod Posted February 26, 2009 Posted February 26, 2009 Correct, left front corner of the engine bay, right in front of the air box. The switched output of the fog light switch comes out on pin 10 (BRN/WHT wire on mine); you use that wire to trigger the new fog light relay.
jtdesigns Posted February 26, 2009 Posted February 26, 2009 Correct, left front corner of the engine bay, right in front of the air box. The switched output of the fog light switch comes out on pin 10 (BRN/WHT wire on mine); you use that wire to trigger the new fog light relay. Roger that... :thumbsup:
jtdesigns Posted March 4, 2009 Posted March 4, 2009 No work... :( I'm not getting any power to the switch... Wondering if theres a fuse or a lead thats goes in the fuse box... :dunno:
HOrnbrod Posted March 4, 2009 Posted March 4, 2009 The factory fog light switch doesn't have power to it. It's used to apply a switch a ground to trigger the fog light relay. I'll send you the wiring diagram then it'll be as clear as mud. :D Think I still have your addy somewhere......
mvusse Posted March 4, 2009 Posted March 4, 2009 It also goes through the headlight switch. Fog lights will only work if head lights are on.
HOrnbrod Posted March 4, 2009 Posted March 4, 2009 It also goes through the headlight switch. Fog lights will only work if head lights are on. Yes, this is how the factory wiring is, fogs only on low beam. But I'm talking about utilizing the existing fog light switch wiring in the harness present in all MJs/XJs to add fogs, instead of doing it from scratch. That's because I'm basically a lazy bastid. It's surprising how much unused wiring is present in the existing wiring harness that can be used for various options and accessories that have not been factory installed. Might as well use it.
mvusse Posted March 4, 2009 Posted March 4, 2009 Not all harnesses are wired for fog lights. My original harness was, but my truck had fog lights. The replacement header panel off a 91(?) XJ did not have the wiring, so I kept the remains of my old harness. It was badly damaged by the deer that hit the truck before I bought it. My 94 XJ also does not have the fog light wiring in the harness.
HOrnbrod Posted March 4, 2009 Posted March 4, 2009 The wiring I'm referring is from the fog light switch (or driving light) connector tucked up behind to dash bezel out to the engine compartment only. Never seen an XJ or MJ that did not have this. Saves running yet another wire thru the firewall..........
jtdesigns Posted March 4, 2009 Posted March 4, 2009 No mail yet... but it is my sn then add the number 1 @ yahoooo dot com Would there not be 12 volt + going for the indicator light?? I didnt have any power at the switch connector.. Lights on, high, and low. I put a 91 XJ w/ fogs harness in the 96's header panel.. The connector was the same. Well it fit, and all my lights (head, blinker, ect..) work, but not the fogs. Relay is good. I need to dig in deeper... I was thinking there was a lead that clipped into the fuse box some'a'wheres.. Shoot me that wire diagram and I'll see what goes where on my XJ. :thumbsup:
mvusse Posted March 4, 2009 Posted March 4, 2009 My bad. I thought you were talking about the headlight harness that runs behind the header panel and goes to all the bulbs.
HOrnbrod Posted March 4, 2009 Posted March 4, 2009 UB right - unfortunately that harness is not there. :D
jtdesigns Posted March 5, 2009 Posted March 5, 2009 Thanks for the email Don.. Now, is that the way everything works from the factory?? Your specs says I should have 12 volts going to "B" on the switch..
HOrnbrod Posted March 5, 2009 Posted March 5, 2009 Crap JT, didn't even look before I sent. Yes, I used the dash switch to apply a 12V trigger to the relay, not a ground. And no, that is NOT how it's wired from the factory; the 12V signal to the foglight switch goes thru the headlamp dimmer switch first to prevent the foglights from being ON when you have the headlamp high beams on. I chose to wire it like that so I control when the foglights are on. And yes, I'm aware this is illegal in some states, and I don't care. :D
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