87Chief Posted September 27, 2012 Share Posted September 27, 2012 Ok, I am installing some fog light wiring, my grandpa's old wiring started to blow the fuse whenever I would turn them on, so i decided to get some new wiring in the Jeep.. I have some pictures of this electrical control box ( :fs1: ) and I'm not sure what wire is what.. In the pictures there a green wire(s) with some blue connectors to it, and I'm trying to figure out what it goes to.. Then the red wire has a label on it that says brown and red twisted for gas blah manual transmission blah blah....Is anyone familiar with these wires? I need to find the wire that connects the low beam so I can have my fogs on when I'm in low beam and off in high beam... Sorry for the long long story, but this wiring is very frustrating, I guess I need a haynes or chilton manual.. Pictures.. The "box" see the blue connectors? The "red wire" The "green wire with connectors on it, where it comes out of the box??" And the wiring I'm "putting in.." :banana: Thanks in advance everyone, I hope the pics help!! Link to comment Share on other sites More sharing options...
Eagle Posted September 27, 2012 Share Posted September 27, 2012 What year MJ is this? Does that box have a Jeep part number on it? It certainly has nothing to do with headlights. Link to comment Share on other sites More sharing options...
87Chief Posted September 27, 2012 Author Share Posted September 27, 2012 It is a 1987 4 cylinder and I'll be right back with the part number.. P/N 2700144 Link to comment Share on other sites More sharing options...
87Chief Posted September 27, 2012 Author Share Posted September 27, 2012 So, would I just tie it into the head light switch itself? Anybody know where I should plug it into? Thanks Link to comment Share on other sites More sharing options...
87MJTIM Posted September 27, 2012 Share Posted September 27, 2012 Check on old thread for the electrical manual. Look in the DIY Project section for the link about Electrical Manual. http://comancheclub.com/topic/12083-electrical-manual/ DOWNLOAD IT AND SAVE IT!! I did. I have an '87 also, but the wires are the same as the manual. Link to comment Share on other sites More sharing options...
Eagle Posted September 27, 2012 Share Posted September 27, 2012 Thanks to CPA Tim's electrical manual, I confirmed my recollection that there is no black box such as in your photos associated with the headlights. The box you are tinkering with is either the ECU or a cruise control module. I would disconnect from it anything that isn't factory, put it back in the dashboard where it belongs, and start over on the foglight wiring. Link to comment Share on other sites More sharing options...
NotMatt Posted September 27, 2012 Share Posted September 27, 2012 [EDIT]: DOH! Nevermind. Link to comment Share on other sites More sharing options...
87Chief Posted September 28, 2012 Author Share Posted September 28, 2012 Ok, thanks, that might be why my cruise control doesn't work... lol Also, I found where the wire that was plugged into the low beam lights (right behind the passenger headlight connector).. I tried my wiring, but still, blows the fuse.. I just packed it up and called it a night lol Link to comment Share on other sites More sharing options...
Jeep Driver Posted September 28, 2012 Share Posted September 28, 2012 Mount your relay in the engine bay. Wire hot from bat to relay, wire lights to relay, ground, run trigger wire from dash to relay, trigger from any acc wire or fuse block. Your relay IS the switch. All wires should be 12g min except trigger (16g OK). Keep all wires short as possible. Wire each light separate to the relay.......don't' run one wire to one light tapping off the first light to run the second light. Trigger wire only activates the relay and draws virtually no current. You are blowing a fuse because of too much draw. Link to comment Share on other sites More sharing options...
esch Posted March 11, 2014 Share Posted March 11, 2014 Let me apologize for bumping such an old post, but so far this has been the only reference to this mysterious black box that I've found I was playing around underneath my steering column on my 86 nissan hardbody (sorry guys) and found the box with many wires not hooked up to anything in particular. After a bit of searching and some talking with people on a hardbody forum I'm left to believe this has to be some kind of aftermarket cruise control? Wondering if the OP was able to dig up any information on it or was able to wire it up correctly. Thanks, and again my apologies for the bump. Link to comment Share on other sites More sharing options...
87Chief Posted April 12, 2014 Author Share Posted April 12, 2014 I haven't been able to figure it out. I got my fogs working and I just left the box alone. Link to comment Share on other sites More sharing options...
jimoshel Posted April 12, 2014 Share Posted April 12, 2014 Could it possibly the emission timer? Link to comment Share on other sites More sharing options...
Eagle Posted April 12, 2014 Share Posted April 12, 2014 Could it possibly the emission timer? Nope. Much too big, and way too many wires. Link to comment Share on other sites More sharing options...
jimoshel Posted April 12, 2014 Share Posted April 12, 2014 One wire per time zone? :dunno: Link to comment Share on other sites More sharing options...
oldseddie Posted April 13, 2014 Share Posted April 13, 2014 I found one on an old dash I restored. Had several relays that plug into it and appears factory with Chrysler part number. Link to comment Share on other sites More sharing options...
64 Cheyenne Posted April 13, 2014 Share Posted April 13, 2014 Black box = auto alarm or remote start? Wiring doesn't look like it comes from a stock harness. Link to comment Share on other sites More sharing options...
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