Zenobian_84 Posted May 24, 2012 Share Posted May 24, 2012 For the longest time now, my non-AC control panel hasn't worked in the least. Took apart the radio when I was installing it a few months ago and checked all the connections. Everything is hooked up, and I didn't see anything amiss. The sucker won't even turn on. It still lights up when the lights are on, but I can't get it to do anything. Could this be a bad blower, or the unit itself? Or maybe something else entirely? I'm just about out of ideas. I'd like to be able to drive in the rain with SOME kind of air blowing around inside the cab... instead of having to drive in the pouring rain with the window open. :hmm: :wall: Link to comment Share on other sites More sharing options...
Pete M Posted May 24, 2012 Share Posted May 24, 2012 I suggest puling out the resistor pack for inspection. it's only held in with a couple screws and it might be obviously bad like mine was. :thumbsup: Link to comment Share on other sites More sharing options...
Zenobian_84 Posted May 24, 2012 Author Share Posted May 24, 2012 Thanks Pete. I'll take a look at it later when it gets cooler. I have a feeling that might be part of my blower problem. :fs1: Link to comment Share on other sites More sharing options...
Eagle Posted May 24, 2012 Share Posted May 24, 2012 The resistors only control the slower speeds. If the resistor pack is bad, the fan will still run at full speed when the control is placed in that position. If you have NOTHING, the fan is probably bad. It's easy to test -- three screws from the engine side of the firewall remove it, and you can jumper the two terminals on the connector directly to the battery to see if it runs. My '88 XJ is on its third fan, and that one's on the way out. Link to comment Share on other sites More sharing options...
Zenobian_84 Posted May 24, 2012 Author Share Posted May 24, 2012 The resistors only control the slower speeds. If the resistor pack is bad, the fan will still run at full speed when the control is placed in that position. If you have NOTHING, the fan is probably bad. It's easy to test -- three screws from the engine side of the firewall remove it, and you can jumper the two terminals on the connector directly to the battery to see if it runs. My '88 XJ is on its third fan, and that one's on the way out. I say the resistor is only part of the problem because as I found out, and like you said, my fan only worked on high speeds for its final leg before it totally gave out. More than likely, I will end up replacing both the fan and the resistor, as I'm 95% sure they're the 25 year old originals. :fs2: Link to comment Share on other sites More sharing options...
dasbulliwagen Posted May 25, 2012 Share Posted May 25, 2012 I noticed whn I did my AC conversion, that the fan was a little sticky, so I oiled it before reinstalling. But usually, high load resistance in a motor will cause the resistor to go bad, and if left long enough then the motor eventually burns out. Like was said, check your powers at the resistor and with switch on high, check power at the fan connector. This should tell you whats wrong.... probably needs both. Link to comment Share on other sites More sharing options...
ComancheKid45 Posted May 25, 2012 Share Posted May 25, 2012 Also make sure the connecter is still connected behind the HVAC controls, Mine came loose 1 day after messing with the radio, causing the same "no airflow" symptoms ;) Link to comment Share on other sites More sharing options...
carnuck Posted June 7, 2012 Share Posted June 7, 2012 My fuse was melted into the box, but it looked good still. Link to comment Share on other sites More sharing options...
Zenobian_84 Posted June 8, 2012 Author Share Posted June 8, 2012 For anyone wondering, and for people who find this thread and need assistance; I replaced the resistor today with no improvements whatsoever. Next on the list is to replace the blower motor and check the vacuum lines again. If that doesn't yield anything, it's off to the junkyard for another Non-AC Control panel. Will post results as progress is made. :smart: Link to comment Share on other sites More sharing options...
Akula69 Posted June 8, 2012 Share Posted June 8, 2012 You might want to check the ignition switch (down low on the steering column). When my blower started getting squirrley I found that the plug for that portion of the harness (the blue one) was partially melted to the ignition switch. In reading about it, Cryco had discovered the origional factory wiring to the blower was sufficient when the blower was new, but as the blower got older it was drawing more and more current, and melted the wiring. Replaced the ignition switch, spliced in a new plug, and replaced the blower motor and all was good as new. Link to comment Share on other sites More sharing options...
juan Posted June 9, 2012 Share Posted June 9, 2012 I have a similar problem every now and then. My blower does not run when I turn it on, A quick check of thre blower fuse revealed it was sligthly loose and will make intermitent contact. Most of the time as soon as I touch the blower fuse, the blower quickly came back to life. My solution was to slightly bend the fuse contacts in the fuse box and sligthly bend the legs of the fuse - this way the fuse will make good contact and the blower will work. Link to comment Share on other sites More sharing options...
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