brendan88mj Posted December 5, 2013 Share Posted December 5, 2013 So, my blower motor decided to stop working (just in time for winter). Fuse is good. Replaced it just in case.I even went through and cleaned all the grime out of the fuse block. Still doesn't work. Then I took the heater control assembly out of the dash and checked the connections. Aaaand still no luck. What are the chances it is actually the the blower motor that went bad? or is it more likely something else? any advice would be greatly appreciated as it is 20*F where I live right now and its impossible to drive without the blower working. Link to comment Share on other sites More sharing options...
ftpiercecracker1 Posted December 5, 2013 Share Posted December 5, 2013 Take a test light and check for power at the plug. Super easy. Key has to be in the "On" (accessory?) or "Run" position. Plug for the blower is directly below the pressure bottle. No power, problem elsewhere Power, blower motor dun did dead. Link to comment Share on other sites More sharing options...
Tactical Bacon Posted December 5, 2013 Share Posted December 5, 2013 Hotwire the blower to the battery just for a second to see if it kicks on. No spin, bad blower. Lotsa spin, bad resistor. Link to comment Share on other sites More sharing options...
nitroxsteve Posted December 5, 2013 Share Posted December 5, 2013 Hotwire the blower to the battery just for a second to see if it kicks on. No spin, bad blower. Lotsa spin, bad resistor. if the resistor is bad it should still work on high speed. Link to comment Share on other sites More sharing options...
cruiser54 Posted December 5, 2013 Share Posted December 5, 2013 Take a test light and check for power at the plug. Super easy. Key has to be in the "On" (accessory?) or "Run" position. Plug for the blower is directly below the pressure bottle. No power, problem elsewhere Power, blower motor dun did dead. I like this method.^^ Link to comment Share on other sites More sharing options...
Eagle Posted December 5, 2013 Share Posted December 5, 2013 They don't last forever. My '88 XJ at 287,000 miles is on the third blower motor. Link to comment Share on other sites More sharing options...
SW86 Posted December 5, 2013 Share Posted December 5, 2013 mine just went out as well. thanks for the tips guys Link to comment Share on other sites More sharing options...
yxmj Posted December 5, 2013 Share Posted December 5, 2013 Hotwire the blower to the battery just for a second to see if it kicks on. No spin, bad blower. Lotsa spin, bad resistor. if the resistor is bad it should still work on high speed. I am up in Canada and My Yj blower (same resistor principle) has been hot wired to a toggle switch for 3 years..... Link to comment Share on other sites More sharing options...
brendan88mj Posted December 5, 2013 Author Share Posted December 5, 2013 I have power at the plug, (i used a multimeter). AND, it appears the blower "dun did dead". The bottom vacuum hose came off of the motor and it sucked in a bunch of dirt and destroyed it. Thanks for all the help everyone! Link to comment Share on other sites More sharing options...
cz777 Posted December 6, 2013 Share Posted December 6, 2013 They don't last forever. My '88 XJ at 287,000 miles is on the third blower motor. yes they do die too, my worked till 3 months ago too it was made in Canada now the new one is made in Mexico ....damn ! Link to comment Share on other sites More sharing options...
Tactical Bacon Posted December 8, 2013 Share Posted December 8, 2013 Hotwire the blower to the battery just for a second to see if it kicks on. No spin, bad blower. Lotsa spin, bad resistor. if the resistor is bad it should still work on high speed. Depends on what went wrong with the resistor and what kind of car it is. I know that anything Chrysler/Dodge/Jeep for the past 15 years or so is that way but I haven't had the pleasure of diagnosing one of our 'Manches yet. Link to comment Share on other sites More sharing options...
Eagle Posted December 8, 2013 Share Posted December 8, 2013 The resistor pack has three resistors, or different values. Full voltage runs the fan at full speed, and this will still function even if the resistor pack is blown. The resistors drop the voltage, causing the fan to run at reduced speeds. There's a thermal fuse in the pack, and that's what usually goes bad. But -- it's soldered in place, and there is no published procedure to repair a bad resistor pack. It's much easier to just replace it. Link to comment Share on other sites More sharing options...
carnuck Posted December 20, 2013 Share Posted December 20, 2013 I have power at the plug, (i used a multimeter). AND, it appears the blower "dun did dead". The bottom vacuum hose came off of the motor and it sucked in a bunch of dirt and destroyed it. Thanks for all the help everyone! At least all you need to do is pull the stupid fill bottle (even easier if you did the rad upgrade to open system when you put the new one in and elminated that thing) and take off those 3 nuts/screws holding it in. Usually 1/2 hour or less. Link to comment Share on other sites More sharing options...
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