Power windows, AC, and wouldn't start - JeepForum.com
 
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post #1 of 6 Old 09-25-2017, 08:02 AM Thread Starter
Wiredawg119
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Power windows, AC, and wouldn't start

I am glad to be here! I recently picked up a 1999 XJ and I look forward to being a part of this community. I did want to start off with a question because I am having some weird issues.

The Jeep I got recently got a rebuilt engine and transmission and this weekend I put new gears, water pump, and exhaust manifold.

I was told that every once in awhile it will give issues starting. The owner thought it could be the PCM. I drove it fine after working on it Saturday but I noticed the air conditioning was not blowing and my power windows stopped working. As soon as I parked it, I turned the key off and then back on and the windows and air conditioning worked again. However, it would not start. The starter is new and it cranks strong. After about a minute or two it did finally start. Any ideas what could cause all of that? The jeep was a toy and saw its fair share of mud and river water but has been rebuilt and not driven often recently.

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post #2 of 6 Old 09-25-2017, 10:56 AM
bluejunior
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I'd start with the ignition switch and associated wiring. Windows and A/C are both ignition on items, and of course the signal for the starter relay ultimate comes from the ignition switch.

Just a best guess, though. These symptoms don't match any common "oh that's definitely X part" type of XJ problem I'm aware of.

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post #3 of 6 Old 09-25-2017, 12:26 PM Thread Starter
Wiredawg119
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Thank you, I appreciate your reply. I did think of that and will take a look but the air conditioning and windows cut out while I was driving it. I didn't notice anything else that was out, but I honestly wasn't looking either.

It seems to only do it when it is hot. I don't know maybe if the not starting and the loss of Windows and air conditioning are related or a coincidence. Could the PCM have anything to do with it? I also read a lot about the crankshaft position sensor and the things it could cause. Maybe that?
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post #4 of 6 Old 09-25-2017, 12:29 PM
bluejunior
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The PCM isn't involved in the blower motor going on or off, nor does it have anything to do with the windows. It can cause a no start, though.

CPS can fail in a temperature sensitive manner, where it fails when warmed up and lets the jeep start again once it's cooled down.

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post #5 of 6 Old 09-25-2017, 01:05 PM Thread Starter
Wiredawg119
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What could have caused the issue with the windows and blower? Seems like these issues arent related.
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post #6 of 6 Old 09-25-2017, 01:09 PM
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Just about anything they share in the circuit, which is mostly ignition related items. Anything else on ignition on cut off? Radio for example?

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