Question about 1993 Jeep Grand Cherokee
Blower motor will go on for a minute and then stop. It starts about 10 minutes later and stops. I already replaced blower motor and blower resistor board. Same problem. Please help.
It sounds to me like an 'intermittently open circuit', or in plain language, when some part of the heater's circuit heats up a connection somewhere in the circuit 'opens up' stopping the flow of electricity. Then (10 minutes later?) when the circuit cools again the connection 'closes' again until warm. I would trace all the wires in that circuit from the fuse box to the blower motor (including fuse box & fuse) and look for broken or cracked insulation; make sure all connections are tight; I'd certainly check the heater's 'setting' switch (off,high, low switch) on the dash. It could also be a fusible link. This is a piece of wire somewhere in the circuit that 'feels' different than the other wire, more 'rubbery' and not as stiff. It's actually a little thinner wire inside than the rest of the circuit made to burn cleanly through (acting as a type of fuse) rather than over heating the circuit itself The problem has to be in this circuit, and something that 'opens' when heated. Good luck!
Posted on Nov 24, 2008
Tips for a great answer:
May 10, 2016 | Cars & Trucks
Feb 01, 2014 | Cars & Trucks
Jun 24, 2012 | Peugeot 307 Cars & Trucks
May 29, 2011 | 1998 Buick LeSabre
Jan 27, 2011 | 2004 Chevrolet TrailBlazer
Dec 20, 2010 | 1994 Ford Escort
Jan 19, 2009 | 1996 Dodge Intrepid
499 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: