AMC86Kid Posted June 9, 2020 Share Posted June 9, 2020 Does anyone know how the rear white back up lights work, what actually turns them off and on I thought it would be this switch on the tranny but I can only get it to tone out on the middle pin and ground only when it’s in neutral all other wires I get no tone at all when it’s in any mode of shift Link to comment Share on other sites More sharing options...
Wounded_Fighter Posted June 9, 2020 Share Posted June 9, 2020 If it's an automatic that might be the neutral safety switch? Not sure if our jeeps had those, no real experience with the autos Link to comment Share on other sites More sharing options...
AZJeff Posted June 9, 2020 Share Posted June 9, 2020 The AW-4 neutral switch is attached to the gear select shaft, not like what is shown in the above photo. Of course, the AW-4 was used with the 4.0L straight six. I don't know which auto trans was used on the V-6 equipped MJ/XJ vehicles, and don't have a shop manual that goes that far back. Sorry... Link to comment Share on other sites More sharing options...
eaglescout526 Posted June 9, 2020 Share Posted June 9, 2020 He has the Chrysler A904/A999 Link to comment Share on other sites More sharing options...
jdog Posted June 9, 2020 Share Posted June 9, 2020 it is that switch, if you can't get it to ohm out when in reverse, its out of adjustment, dirty, or bad. power comes in on the bottom wire(yellow) and leaves on the brown wire, if you jump the yellow to the brown your lights should light up. if so then you know the circuit is good, remove the switch and bench test it, you should be able to ohm it and move the plunger in and out, if it doesn't ohm good replace it Link to comment Share on other sites More sharing options...
jdog Posted June 9, 2020 Share Posted June 9, 2020 also make sure the turn/ bu fuse is good Link to comment Share on other sites More sharing options...
AMC86Kid Posted June 9, 2020 Author Share Posted June 9, 2020 Ok I will test it again with the logic that you said but I’m pretty sure it’s just old and gone bad Link to comment Share on other sites More sharing options...
AMC86Kid Posted June 9, 2020 Author Share Posted June 9, 2020 Ok I hooked it up like you said and it works for some reason it wouldn’t tone out but after sending power threw it then it worked and decided to tone out maybe it was just dirty Link to comment Share on other sites More sharing options...
AZJeff Posted June 9, 2020 Share Posted June 9, 2020 2 hours ago, jdog said: it is that switch, if you can't get it to ohm out when in reverse, its out of adjustment, dirty, or bad. power comes in on the bottom wire(yellow) and leaves on the brown wire, if you jump the yellow to the brown your lights should light up. if so then you know the circuit is good, remove the switch and bench test it, you should be able to ohm it and move the plunger in and out, if it doesn't ohm good replace it One more knowledgeable than I has spoken. Good post. Link to comment Share on other sites More sharing options...
AZJeff Posted June 9, 2020 Share Posted June 9, 2020 4 hours ago, eaglescout526 said: He has the Chrysler A904/A999 Another one more knowledgeable than I when it comes to very early Comanche's and Cherokee's. Link to comment Share on other sites More sharing options...
eaglescout526 Posted June 9, 2020 Share Posted June 9, 2020 10 minutes ago, AZJeff said: Another one more knowledgeable than I when it comes to very early Comanche's and Cherokee's. Thats ok. That’s what this forum is for, to share the history and knowledge of these trucks. Even have a whole rebuild book on the trans too. Link to comment Share on other sites More sharing options...
jdog Posted June 9, 2020 Share Posted June 9, 2020 usually the case, trans fluid and dirt cause for poor connections, glad to hear its working 36 minutes ago, AMC86Kid said: Ok I hooked it up like you said and it works for some reason it wouldn’t tone out but after sending power threw it then it worked and decided to tone out maybe it was just dirty Link to comment Share on other sites More sharing options...
jdog Posted June 9, 2020 Share Posted June 9, 2020 33 minutes ago, AZJeff said: One more knowledgeable than I has spoken. Good post. can't take credit for amc using chrysler parts lol Link to comment Share on other sites More sharing options...
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