1986 Jeep CJ7 starting issue

CMILLER0112

MEMBER
1986 JEEP CJ7
100,000 MILES

I have a 1986 CJ7 that was retrofitted with a 4.0L fuel injected engine before I bought it 12 years ago. It spends a lot of time sitting but has always started fine. A few weeks ago I went to start it and it turned for about 30 seconds and then dead silence. Had the battery checked, was fine. Replaced the voltage regulator, starter and alternator also checked out fine, replaced the ignition safety switch. Still nothing. Any ideas? The wire going to the coil is active even when the key is in the off position. I plan on keeping this jeep forever but cant afford to replace the wiring harness right now if that is the solution.

2 Replies

HMAC300

MECHANIC
48,601 POSTS

Check to see if the starter relay is ok or not. It may not be sending power to starter. See if one of the fusible links are burnt as well they are available at auto parts. Just tes for power on both ends see that they have same voltage. Make sure battery and cable end at starter are same voltage as well.

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Saturday, October 12th, 2013 AT 11:07 AM

CJ MEDEVAC

MECHANIC
11,004 POSTS

CHECK OUT MY ANSWER IN THIS LINK (REALLY UNDERSTAND IT)

https://www.2carpros.com/questions/1996-chevrolet-tahoe-wont-start-sounds-dead-battery-jumpbox-get-same-reults

IF THAT AIN'T NO HELP

WITH THE KEY ON, YOU HAVE WHAT KINDA VOLTAGE AT THE POSITIVE SIDE OF THE COIL?

DO YOU HAVE VOLTAGE ON THE "S" WIRE ?

SAFETY SWITCH.......I TAKE IT THAT THIS IS AN AUTOMATIC?

.........IF NOT, HOW 'BOUT MR. CLUTCH SWITCH?

SOMETIMES PICS OF WHAT YOUR ENGINE/ AND AROUND IT MIGHT HELP IN "ACCIDENTALLY SEEING A PROBLEM.....EVEN A GOOD PIC OF THE WIRING AT THE STARTER......AND ANYTHING THE BATTERY CABLES TRAVEL TO AND THRU..............THIS MIGHT SORTA HELP ME IN CHOOSING/ MAKING THE DIAGRAMS I SEND

THE RETROFIT MAY MAKE THIS INTERESTING AS FAR AS THE WIRING

THE MEDIC

.........WELL OVER 7000 ANSWERS/ PICS/ DIAGRAMS PROVIDED

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