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Unread 11-03-2015, 02:08 PM   #1
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Join Date: Apr 2015
Location: talking rock, ga
Posts: 4
wiring help...

good people of the jeep forum im in need of your wisdom. the other day i cleaned up my connections on my starter solenoid and reinstalled it on my 1987 grand wagoner .. and i done all this because is was sticking and thought it would help after reinstalling it wouldn't work so i thought a good whack with a hammer might fix it as it often does with solenoids. but then i noticed a wire getting hot in the loom so i traced it and couldn't determine the problem so i unhooked the battery and when to bed. when i woke up the next day i hoooked the battery back up and the wire was still getting hot . so i traced and disconnected it. well i got the solenoid working and now the thing will run along as the key is held in the start position bun dies at the run position... so off to my buddy's shop i go for a wiring diagram (attached bellow) to find that the wire that was burning was a resistance wire ..so my question is. what is a resistance wire, do i need one, can i just use a piece of copper wire and a resistor from radio shack ,or is my problem else where,could my starter solinoid have something to do with it? i circled the problem area in the attachment i know its hard to read if i need to ill try to get a better picture soon.


File Type: pdf fsj.pdf (631.4 KB, 8 views)
lanepeppers1994 is offline   Reply With Quote Quick reply to this message
Unread 11-03-2015, 04:46 PM   #2
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1997 TJ Wrangler 
Join Date: Apr 2009
Location: Arizona
Posts: 715
That wire feeds the ignition coil and ignition module in the run position. During cranking, the wire is bypassed with another wire (see your diagram). When you let off of the key, the bypass goes away so the engine stalls.

The resistance wire is used to drop voltage to the coil and module. Full 12 volts will eventually damage both. During cranking, the voltage on the bypass wire is below 12 (due to the load of cranking) so no damage is done. So yes, you need the resistance wire, but I don't know if RS resistor will get the job done.
Bigger question is why is the wire getting hot now? Are you sure you hooked everything up the correct way?

I start what I finish!
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Unread 11-04-2015, 01:24 PM   #3
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Join Date: Apr 2015
Location: talking rock, ga
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well i think it has something to do with the soloinoid itself becuase sometimes it works sometimes it doesn't sometimes you can hit it and it work and it constantly sticks so i need a new one anyway. and i talked to an employee at my buddys diesel shop and he loves amc360 and is familiar with it and he told me to buy a chevy ballast resistor and it will work and you can get rid of the wire itself. and i installed it but cant get the jeep to crank over because of the sgot solenoid...
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Unread 11-21-2015, 06:18 PM   #4
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1976 FSJ Gladiator 
Join Date: May 2014
Location: Fort Worth, Texas
Posts: 14

if you change the distributor to an HEI, then you can do away with the resistance wire, that is what I did, you shouldn't need a ballast resister either, plus the spark will be better and the system will be more reliable
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