Have Jeep Questions? Ask a Jeep Repair Expert for Answers
Hello, my name isXXXXX you for allowing me to assist you! So it won't even crank when you turn the key to the start position? Will the starter "click" at all, or do you hear nothing at all?
Do the headlights come on nice and bright?
Ok good. Now with the headlights on, turn the ignition to start. Do the lights dim, go out, or stay bright?
Ok Mike do you have a 12 volt test light so we can check out a few things?
Ok, that will work. Remove the starter relay and look on it for the terminal designations. They will be labeled 30,87,85, and 86. Now probe the #30 cavity. Tell me if there is voltage there. If so, then probe cavity # XXXXX and 86 while someone turns the key to start. Let me know if there is voltage there.
Mike it should be in the under hood fuse box. On the inside of the fuse box lid, there should be information as to which one is the starter relay.
You were having someone hold the key to start when checking 85/86 correct? Also, is this an auto or manual trans Jeep?
Ok, now let's check for power at the clutch pedal switch under the dash at the pedal. You should see a solid Yellow wire going to the switch. See if there is power there when turning the key to start.
Oh, ok. Now I want you to jump cavities 30 and 87. Make sure the trans is in neutral just in case it cranks. Turn the key on, and get a small wire to jump 30 and 87 together. The engine should crank and start. Let me know Michael,
Hmm 30 and 87 recheck that. There is no 39.
Ok, no problem. take a longer jumper wire and connect one end to the small terminal on the starter and the other to the positive battery cable. See if it will crank. Make sure it is in neutral,
Go ahead and unplug it.
Ok, then that starter is no good, or you have a poor engine ground. Try this Mike: put the relay back in and reconnect the starter wire, get a pair of jumper cables and connect the black clamp to the engine block, and the other end to the negative battery cable at the battery. See if it will crank. I need to get off line for about 40 minutes, but will be back and see what happened.
Well if what you tell me is true, and adding the extra ground from the battery to the block, and adding the extra positive cable from the battery to the starter's large terminal did not help, then that starter is bad. I know you said it tested good, but maybe it was a flawed test. Try tapping on the starter while someone turns the key,
Hmmm, That makes me think it is the starter then. You see, by bypassing the starter relay and jumping the starter directly, that should turn the starter on and crank the engine. I say go and get a new starter Mike
You are welcome Mike!!