egranlund

Hey all,

Just to start off, I have no idea about Jeeps, this is my brothers jeep. I have a VW Rabbit from the 80's...talk about 180

His jeep is a 1993 Cherokee with an inline 6 and an automatic transmission.


So, my brothers car has been stuck in front of this guys house for a while, and for the longest time, we thought it was just being stubborn.

What it would do, is it would start up, the die in ~2 seconds, slowly the rpms would go away. We got it towed home, and he starts messing with it, and replaces spark plugs, wires, cap, rotor, and alternator. Same problem. He gives up.

Now, I'm working on the car, and while looking around, I noticed that we are missing the fuel pump relay, along with the aux fan relay. My brother recently pissed someone off, and that's right about the time when his car stopped working. Duh, I think, and we get the fuel pump relay, but now the car dosn't start at all.

Here is what happens. Put the car on the on position, I can hear the fuel pump prime for about a second, then I try to start. Cranks beautifuly, but, the engine just turns and turns, it never catches. Afterwards, I smell gas, and a hear vacuum leak.


This is what I have done:
-Cleaned and reseated the connector for the CPS
-Went around to all of the other connectors, reseated all the ones I could reach.
-Checked all of the fuses + relays, reseated all of them. Only fuse that was out, was the aux fan fuse (the smaller one).
-He had the spark plugs gapped wrong, I regapped them. Checked the firing order, we're golden.
--3 of the relays have the same part number, which I found weird. Part number 56006709
-Went through the self test thing with the blinking check engine light, here is the codes I got:

12 - Battery Disconnected
41 - Alternator Field Not Switching Properly
33 - Air Conditioning Clutch Relay
35 - Cooling Fan Relay Circuit
55 - End of sequence


Now, my brother doesn't take it easy on his car, and the entire engine bay is coated with mud, and various fluids, so I suppose this could also be related, however, the fact that we were missing a relay leads me to suspect that one of his friends that he ticked off that knows about jeeps, just disconnected something.

Here are some pics of everything that I thought might show something that I'm missing:

Unplugged connector on the drivers side, probably dosn't do anything, been like this since he's owned the car:


Unplugged connector by the middle of the windsheild:


Jumble of connectors that I reseated near the passengers side:


Some connectors towards the front of the car, by the hose to the airbox:


This is the way the fuse/relay box looked:


This is how it looks now:




Thanks

jpdocdave

pretty weird. you really need to test now if you have spark, and injector pulse.

all those codes are basically erroneous. a/c code and alternator code and battery disconect code are there on a lot of jeeps for no reason.

cherokee4meplz

.

I think this may be a cam sensor or other important sensor's connector that has been tampered with or unplugged. Look around at the back of the cylinder head and see if the sensor back there is plugged in.

mike37

check the vacuum line going to the fuel presser regulator
it at the front of the fuel rail

Long Island XJ

I read your thread on a whim cuz i liked your title. I'm in the middle of doing my VC gasket. I saw a connection that reminded me of one of your pics, the one in the middle of your windshield. There is a connection on the top of the head drivers side. look for that. maybe, maybe not your problem bit it clicked im my head.

tjx54

http://farm4.static.flickr.com/3336/...5417f8.jpg?v=0
most if not all of these wire go to the trans..
http://farm4.static.flickr.com/3391/...c31c1f.jpg?v=0
it looks like you are still missing a alternator fuse about mid way up on the left side

mike37

yes he is a larg 60 amp one

I would replace all missing fuses and relays you will need them all
in place for it to run properly

cherokee4meplz

can anyone with a 93 look under the hood right quick and see about that connector in the middle of firewall below windshield? I checked out my 1990 renix beast and I do not have a loose connector there.

It seems someone went unplugging things and pulling fuses/relays on this guys truck to me.

mike37

I don't have that plug on my 91
but it was not connected look at it it is way to dirty to have ben unplugged recently

96 XJ Sport

That one looks just like the one on my 96 which goes to the underhood light.

cherokee4meplz

ahh- that makes sense. just trying to help the guy- the problem must be something else then. + you are right, it's too dirty to be recently unplugged.

96 XJ Sport

No worries...that just happened to be the only one of the pics above that I recognized

egranlund

thanks for the tips all. When I get a chance I'll double check about the fuses. I must say the Hayes isn't the most descriptive manual (compared to the Bentley for my car at least), and I'm left to rely on the diagrams on the jeep itself.

That unplugged connector...I couldn't seem to find where it goes. It comes out near the windsheild washer fluid reservoir, and has a mounting piece about midway through it. The colors of the wires is black + red (or red with a black stripe...the wire is kinda dirty, heh). I couldn't really get it to reach anywhere useful...the max it'll reach would to be over by the distributer, so, maybe it was unplugged before.


Also, here is another pic I took that I forgot to post. The fuse box in the car. I doubt someone would've messed with this...but it's worth a post.




Thanks


EDIT:

Also, are all of those relays on the diagram supposed to be there? As you can see from the grime, it seems to have been missing the 2 in the middle, and the one all the way at the end.

BLKXJ 96

Connector in the first pic is the diagnostic port.

5-90

#1 - Diagnostic Port for PCM interrogation. Not meant to be connected to anything, unless you've got an scanner hooked up. OBD-I spec, Chrysler-specific connector.

#3 - Those two largish plugs are for the NSS and solenoid controls for your transmission. It's possible for the NSS to cause a "No Crank" condition - since the starter motor relay circuit is run through the NSS to make sure you only try to start in P or N.

#4 - Unless I'm missing something, I don't see anything loose in that pic. However, note the small segment of rubber vacuum hose immediately off of the large air hose into the throttle body - see the cracks? It's getting old. Replace it before it causes problems.

For the PDC (large black box with fuses and relays,) you'll want to fully populate the thing. It's main power distribution for the vehicle, and it can be problematic if everything isn't in place. Check the population diagram (inside the lid) against the options you have - you may not need all of the sockets filled, but you will need the ones filled that correspond to the rest of the vehicle! Looks like it's all standard MAXI fuses, MINI fuses, and DIN relays (which should be available through any local parts house - the DIN relays for less than ten bucks a copy.)

Looking at the underdash fuse block pic you posted, it looks to be fully populated. The only socket I can see that looks like it should have a fuse and doesn't is the "PWR ACCY" (Power Accessory) at the bottom left, near the turn indicator flasher (large silver can,) but that could be anything and wouldn't cause a "No Crank/No Start" condition.

EDIT - If I'm reading your pic right, the third relay down is for the ABS pump - if you don't have ABS, you don't need the relay. I can't quite make out the last one.