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Savage

2003 Lincoln Town Car, krystal PN 13-976 circuit board

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by , December 16th, 2015 at 11:10 AM (6587 Views)
I'm having issues with the crystal coach circuit board I see it seems to have A digital to analog conversion system in it along with the standard 18 or 20 relays while running the air conditioner stays on full blast and there is no control of rear locks or air conditioning fan speed temperature accessory in the rear so I'm thinking the digital might be gone in it anyways im trying to troubleshoot this issue I'm an electronics technician and I'm trying to fix this for my friend does anyone have a schematic or even an operation user's manual

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  1. LGAL's Avatar
    If your Krystal is like mine there are A/C fan speed control plug in relays in the control panel and they sometimes go bad. Easy to replace. Any auto parts place has them.
  2. Savage's Avatar
    I have already gone through all the relays and replaced 2 of them (because the coils were gone) fried lol, and I'm starting to wonder if there was a surge of some sort. No dice. The rear display board is getting power and seems to be working (led's bar lights) but you can adjust the temperature and fan speed and it won't change anything. It just runs full blast -same with the cabin lights and door locks are unresponsive
  3. Savage's Avatar
    I am an electronics technician. A service manual would be lovely
    Updated December 16th, 2015 at 03:49 PM by Savage (double post oops)
  4. Jon Hook's Avatar
    Hi there, just wondering if you got anywhere. I have the exact same car and having similar issues