88 Mj Does Not Have Power Need Help.

[tprman]

I need a little help. My 88 MJ does not have power to the blower motor, horn, wipers, turn signals and there no power going to the fuse box for blower motor. I do have power to other fuses in the fuse box but not the things listed above. Also my radio and cigarette lighter plug does not work. What may be the problem.

[AeroNautical]

Any number of things, but firstly, is your truck a manual? And if so, check to see if your master cylinder is leaking. If it is, your fuse box is most likely fried, brake fluid and electronics don't mix well. 

[tprman]

Nope it a automatic on the column.

[gogmorgo]

If you check out this wiring diagram, (click on it to zoom) you'll notice that your set of non-functional components all take power from a brown wire from the ignition switch. Could be something came unplugged, a wire broke, or something's corroded. Could also be a bad ignition switch, which isn't uncommon.

[tprman]

thanks ill give that a try.

[tprman]

You was right Gogmorgo I pulled the steering column down to check the ignition switch and noticed the brown wire had burn into the ignition switch. I took it out and noticed the ignition switch had been burn where the brown wire pugged in. Luck I had a old wiring harness from a MJ I am parting out laying around. I just replace the end and it started working. I going tomorrow and get a new ignition switch.  Also would you put a braker on the brown wire to keep it from doing it again. Thanks again my MJ Brother.

[gogmorgo]

Honestly, if it were up to me, I'd just replace the ignition switch, make sure it's got all the right fuses in the right spots (see the above wiring diagram) and call it done. It's lasted longer than I've been alive as it was. But it's up to you. I don't see how a breaker could harm anything, but everything down from where you'd put the circuit breaker is fused or on a breaker already.

Glad to know I could help. :)

[tprman]

Thanks. I went to the dealer and got a new ignition switch. Everything works better now. Thanks again for your help. Also I posted another question about wiring up a winch.