I did notice alittle burning, would i have to replace the entire harness side or can i buy separate harness sections. I notice on a website the entire harness is pretty large and would be a pain in the *** to replace all of it. thanks for all your help
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Re: blower motor resistor
You can purchase a " pigtail " for the resistor,which will come with the plug and approx. 8" of wire ( each wire ). The pigtail should cost not much more than $ 20.00,whereas the big harness would probably run you around $ 800.00 ( just a guess ). Replace the resistor and the pigtail at the same time to ensure proper connection.
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Ok the description of problem is lacking some information so I will give you a few places to start from the easy to the difficult. When you say will not turn on I assume you are referring to the blower motor. You do not mention what car or truck assuming that I was in the Chevy section you have a GM car or truck.
Start at the fuse panel and see if there is a defective fuse. (note I have see fuses that look ok but hare bad so if you are not absolutely sure it is cheep to just replace or try a know good if you do not have a tester. The next and most likely culprit is the blower resistor. This is located on the heater box depending on the model /year and options it can be inside car or out side under hood. Replacement can be a two hammer to a all out 4 hammer depending on where it is buried. if the resistor is burned up it is common to have the harness end burned up too so check the end that plugs into harness for melted or burnt contacts, a good tell tail sign is that the plug in harness is melted to the resistor. If the resistor checks out and all is good there then check the blower motor. The blower motor should be checked if the resistor is defective too as a faulty motor that binds or has defective bearings can place heavy loads on the resistor causing it to fail. With out much to go on with your question if the motor is blowing but not much air is moving then check the filter if equipped. I did not mention the control panel as this is usually the last par to become defective on most GM cars and trucks... good luck
If the blower motor works on high, the resistor is the fault. Check condition of wire harness when you replace the resistor, if there is any corrosion on the connectors in the harness- replace that section of harness as well, otherwise you will likely have another failed resistor and potentially have a fire hazard as the corroded terminals heat up and current draw through the wire increases as well.
Your Buick Riviera's heater fan is powered by a blower motor, which in turn is powered by a blower motor resistor. The resistor is a small electrical component that also regulates the fan speeds of the blower motor. Like any part, the blower burns out from time to time and has to be replaced. Replacement blower motor resistors cost about $50. It will take you about 30 minutes to install a new one in your Buick Riviera. Things You'll Need
Open the hood and disengage the negative battery cable on your Buick Riviera using your socket set. You will need a 10mm socket to loosen the battery cable bolt.
Remove the plastic trim panel under the glove compartment on the passenger side of your Riviera.
Loosen and remove the mounting screws that hold the blower resistor in place on your Riviera.
Unplug the wiring harness from the old blower resistor and then remove the resistor completely.
Plug the wiring harness into your Buick's new resistor. Also tighten the screws to hold the resistor in place.
Reattach the negative battery cable on your Riviera and tighten it with your socket set.
Underneath the dash near the passengers feet, right next to the blower motor. It is held by two screws or is clipped in with plastic clips. Probably screws though and has a wire harness attached to it. Very easy to replace, just might have to lay on your back on the passenger side floor to visually see it and remove the resistor pack.
in alot of cases the blower motor resistor burns
if you follow the blower connection to left you will the resistor plugs right in to the blower but make sure you check it before you buy it take it off and inspect it you will see burns on harness and resistor
its under the passiger side dashboard you will see the blower and to the left is the resistor i think you will need a 9/32 socket or 7mm its held by one screw
check the blower speed control, it most likely burned out, also jump battery power direct to the blower and see if it runs, if it does the speed control is defective, if it doesn't the blower motor is toast.