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Old 06-15-2016, 10:27 PM   #1
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AC Heater Fan has no 1,2,3, speed has Hi fan only

2000 Monaco Diplomat 38A 8.3L ISC 41,000 miles.
I did have fan speeds 1,2,3, and HI. now only HI. Failure occurred while driving on highway. No work done prior to this that may has caused it. AC works just lost speeds 1,2,3. Where is the high speed blower motor relay? Where is the fuss for low speeds?
Where can I get a wiring diagram for the AC Heater Switch and controls?
Thanks Lloyd
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Old 06-15-2016, 11:24 PM   #2
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Look on the heater air box for a multi pin connector, it might be th heater sped resistor. It could be open, remove replace

https://images.search.yahoo.com/yhs/...pe=xy_7e0d63c2
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Old 06-16-2016, 05:49 AM   #3
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Thanks for your help. I'll check tonight and give update.
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Old 06-16-2016, 11:15 PM   #4
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fix. It was the resister pack. used Borg Warner # BWD RU1138 with PT766 pigtail. it has a Ford # on it. I'll get it posted next week when I get my Ford friend to convert it to a Ford Part No. Thanks for the help. Lloyd
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Old 06-17-2016, 06:11 AM   #5
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Glad you nailed it.

Also good learning experiences for the rest of us to hear when a solution is found.
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Old 06-17-2016, 06:14 PM   #6
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Quote:
Originally Posted by Lloyd T View Post
fix. It was the resister pack. used Borg Warner # BWD RU1138 with PT766 pigtail. it has a Ford # on it. I'll get it posted next week when I get my Ford friend to convert it to a Ford Part No. Thanks for the help. Lloyd
You are more than welcome!
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