Question about 1998 Buick Riviera
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Posted on Jan 02, 2017
The blower motor control module needs to be replaced, that will solve the problem. The module is underneath the hood on the firewall in the back. It has 2- 6mm screws. Unplug it, pull it out, put the other one back in. Plug it in. This is common for this model buick.
Posted on Jan 14, 2009
it will be hard to diagnose with out having my hands on it but try this.
this vehicle is known for blower motor resistor failure.
under the dash on the passenger side next to the blower motor there is a resistor attatched to the blower motor case it will have a single plug with 5 or 6 wires in it, they are normally within a couple of inches of the blower motor, remove this resistor and look at closely for any signs of burning this is a common problem, you can buy one at any parts house, do not operate the motor with the resistor removed from its mounting hole or you will damage it.
if the resistor looks good than purchase you a test light and drop me a line and i will explain how to test the entire system its not hard to do.
Posted on Jun 14, 2009
The blower motor is vertically mounted below the glovebox on the passenger side. To replace the motor, follow these basic steps. It's actually very simple when you figure out how to contort your body so you can work on it.
You need to remove the bolster cover under the glovebox. To do so, just slowly pull the bolster out from the sides of the passenger side until you come to a plastic, one way connector. (Kinda looks like this -->) |>>>> They are ribbed and impossible to pull out. Take some wire cutters or diagonal cutters and clip the plastic connectors. They are cheap connectors that you can buy for $0.50 a bag at any auto supply shop. When you work your way through the connectors, remove the bolster and the blower motor cage should be visible. It will be lodged behind a mass of wires, and you won't have much room to move in. Look/feel for an electrical connector on the back side of the blower motor and try to seperate that first. If it is too tight, take off the mounting hardware first and see if that gives you more room. There should be three or four nuts securing the blower motor to the base behind the glovebox. Remove these and the motor should simply fall downward. You will have to adjust the wiring to pull it entirely out, but it shouldn't take long. Simply wiggle the new one in the same way you got the old one out. There may not be the same number of mounting screws or they may not line up exactly like the old ones, but it should fit in a particular position. Try rotating it.
When the motor is back in and the screws are back. Test it out and try all the speeds. If everything is working. Take an old plastic connector to a autostore and find matching ones. Reapply the bolster and snap some fresh connectors into the holes. That's all there is to it.
Posted on Oct 09, 2009
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Feb 25, 2015 | 1998 Buick Riviera
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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.
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