fixed my heater blower(switch and resistor pack)
03-14-2007, 07:14 PM
#1
Rennlist Member
Thread Starter
fixed my heater blower(switch and resistor pack)
I had a good day today. My heater fan would only work on speed 3 or off. I traced the connector to the resistor pack and found I was not getting power from the fan switch to all the pins. I pulled the resistor pack using a screw and string to pull and replace the unit. I found a broken resistor coil. I ordered a new one and found it has been superceded with the newer thermal cut-out type. I was looking on ebay and what did I find but a NOS fan switch for $15 shipped.
I got them in the mail today and dropped them in. I had to rearrange the pins in the resistor pack connector. (I pulled out #8 and taped it up; moved #6 to the #8 position.) Now I have 4 speeds at the fan.
I got them in the mail today and dropped them in. I had to rearrange the pins in the resistor pack connector. (I pulled out #8 and taped it up; moved #6 to the #8 position.) Now I have 4 speeds at the fan.
03-14-2007, 08:55 PM
#3
Rennlist Member
Thread Starter
Hi Ed,
No pics. I searched "resistor pack" and got a lot of information, especially from Bill Ball's 4-page thread. There are several pics. Changing resistor takes 10 minutes, no skinned knuckles. I think it may be Bill's own method. Summary:
Remove plastic cover at very rear of engine compartment(fragile). Find resistor terminal near midline of car entering heater duct. Remove plug to expose 7 pins and one hole. Screw a no.12 or so sheet metal screw into hole and attach a 3 foot string. Now unscrew the two mounting screws to allow resistor to drop into the duct with the string tailing behind. Push the rubber boot which connects the blower to the duct open so you can see into the duct. You should see the resistor pack inside. Use a magnet to pull the resisitor to the rubber boot then work it out to the exterior. Do not pull the string all the way through; leave it hanging out the mounting hole. Remove string and sheet metal screw from old resistor and screw into new one. Shove into the rubber boot into the duct and pull the string until resistor emerges into its mounting hole. Screw into place, connect wiring, reposition rubber boot to seal the air. BTW you can test your new resistor without installing it; just plug it in and run the fan for short time so it does not overheat. If your car requires wiring mod, it's mentioned in Bill's thread. Not sure which years require this mod.
Easier to do than to describe.
Hope this helps and good luck.
No pics. I searched "resistor pack" and got a lot of information, especially from Bill Ball's 4-page thread. There are several pics. Changing resistor takes 10 minutes, no skinned knuckles. I think it may be Bill's own method. Summary:
Remove plastic cover at very rear of engine compartment(fragile). Find resistor terminal near midline of car entering heater duct. Remove plug to expose 7 pins and one hole. Screw a no.12 or so sheet metal screw into hole and attach a 3 foot string. Now unscrew the two mounting screws to allow resistor to drop into the duct with the string tailing behind. Push the rubber boot which connects the blower to the duct open so you can see into the duct. You should see the resistor pack inside. Use a magnet to pull the resisitor to the rubber boot then work it out to the exterior. Do not pull the string all the way through; leave it hanging out the mounting hole. Remove string and sheet metal screw from old resistor and screw into new one. Shove into the rubber boot into the duct and pull the string until resistor emerges into its mounting hole. Screw into place, connect wiring, reposition rubber boot to seal the air. BTW you can test your new resistor without installing it; just plug it in and run the fan for short time so it does not overheat. If your car requires wiring mod, it's mentioned in Bill's thread. Not sure which years require this mod.
Easier to do than to describe.
Hope this helps and good luck.
03-15-2007, 12:43 AM
#4
928 Barrister
Rennlist Member
Rennlist Member
$15 for a resistor pack!! You robbed the guy!! What a find.
Bill's method is best. I can say that after skinning some knuckles doing it the "other way". Of course I get to do it all over again since my resistor pack is acting up and turning on the fan intermittently in city driving.
Bill's method is best. I can say that after skinning some knuckles doing it the "other way". Of course I get to do it all over again since my resistor pack is acting up and turning on the fan intermittently in city driving.
