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Heating & Cooling 4th Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #1  
Old 11-27-2018, 06:32 PM
rogsatt34 rogsatt34 is offline
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Default Heater help

I have a 1988 Dodge D100 V6. The heater fan stopped working. I have replaced the fan, relay, and the control switch. Still can't get the heater to work. Please help. What am I missing? I have had this truck for over 10 years and wouldn't trade it for a new one, but this issue has almost broken my spirit.
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Old 11-27-2018, 06:37 PM
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Have you tested the connection for power ? If you hot wire the Fan Motor does it work ? Have you checked the fuse ? Even if it looks good change it as the can look OK and be bad if not blown.. If you have power to the fan motor and still not working run a temporary ground and see what happens. all I can think of for now ! Hope the gear heads speak up !

But WELCOME to the group and please UPDATE us what you find as you may help someone else ! And Hoa about a picture of your truck would love to see it Good luck
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Old 11-27-2018, 06:47 PM
pacofortacos pacofortacos is offline
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Did you replace the resistor - most are out under the hood but a few are inside behind the glove box.

This is usually the most common failure - at least on older cars


https://www.rockauto.com/en/catalog/...+resistor,6557
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Old 11-27-2018, 06:49 PM
rogsatt34 rogsatt34 is offline
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Thanks for the quick reply. Fuse inside the truck is good. Ran the fan directly to the battery and it's good. Trying to check power to the fuse box, but so far no luck. I'm trying to locate a fuse or relay under the hood but can't seem to locate one. I may have to resort to using a toggle switch ran to the fan and to the battery but I'm trying to avoid that. I'll try to figure out how to add a picture of my truck later.
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Old 11-27-2018, 06:50 PM
rogsatt34 rogsatt34 is offline
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Sorry should have added that I did replace the resistor. It was located behind the glove box within the cab of the truck.
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Old 11-27-2018, 06:52 PM
pacofortacos pacofortacos is offline
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Could be a blown fuse link out under the hood, they usually don't go except in the case of a dead short.
They are wires that look like wire but act like fuses.
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