ruralandalone Posted July 30, 2022 Author Share Posted July 30, 2022 I managed to get the instrument cluster out. With the instrument fuse out, the cab lighting harness disconnected, and the lights off, my power lead to the lighting shows continuity with ground. As I read it, that is definitely a short in the supply wiring somewhere between the fuse block and the instrument lights. Link to comment Share on other sites More sharing options...
Ωhm Posted July 30, 2022 Share Posted July 30, 2022 Add 1)Radio, 2)Clock and 3)Radio/LCD Clock Illumination Relay to your disconnect list, then take your measurement to ground. STG could be in one of those components. Link to comment Share on other sites More sharing options...
ruralandalone Posted July 30, 2022 Author Share Posted July 30, 2022 radio and clock are out. As far as can tell there is no separate clock relay in the 86. If there is, I can't find it. And I have looked hard. Link to comment Share on other sites More sharing options...
eaglescout526 Posted July 30, 2022 Share Posted July 30, 2022 And I’m not home so I can not provide assistance at this time. Link to comment Share on other sites More sharing options...
ruralandalone Posted July 30, 2022 Author Share Posted July 30, 2022 My plan is to either identify and cut the supply wire nearish to the fuse box, and try to determine which side of the cut the short is on. and re-wire accordingly. Link to comment Share on other sites More sharing options...
eaglescout526 Posted July 30, 2022 Share Posted July 30, 2022 There’s no relays behind the drivers side kick panel or nothin? I know there’s a few relays there on my 88. Link to comment Share on other sites More sharing options...
ruralandalone Posted July 30, 2022 Author Share Posted July 30, 2022 only 1 relay, and not for the lighting. That is where is SHOULD be.... Link to comment Share on other sites More sharing options...
Ωhm Posted July 30, 2022 Share Posted July 30, 2022 ....oops. I was using the 88 Electrical Manual. No Radio/LCD Clock Illumination Relay. Somehow now I think I've already answered this once. ...oops again. I should know better. Link to comment Share on other sites More sharing options...
ruralandalone Posted July 30, 2022 Author Share Posted July 30, 2022 No, it was useful. W/o your input I would not have figured that there was no relay. I do wish I could figure out where point "F" was in the diagram that shows where the wires from the clock, instruments, radio and cab wiring join up. Link to comment Share on other sites More sharing options...
eaglescout526 Posted July 30, 2022 Share Posted July 30, 2022 I have an 86 wiring book for the MJ that I keep meaning to get scanned. Link to comment Share on other sites More sharing options...
Ωhm Posted July 30, 2022 Share Posted July 30, 2022 Taken from the 87 Electrical Manual. Circle with F in it. Link to comment Share on other sites More sharing options...
ruralandalone Posted July 30, 2022 Author Share Posted July 30, 2022 Thanks. This means that the splice is in the harness, where I cannot easily get at it. Link to comment Share on other sites More sharing options...
ruralandalone Posted July 31, 2022 Author Share Posted July 31, 2022 I have a workaround that I like. I have run a new wire from the lights and am going to use a piggyback fuse to hook it in to the instrument light fuse location. with no fuse in the original socket, I bypass the problem entirely. My clock light can stay on and bright. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now