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FAN DO NOT WORK ON HIGH SPEED Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Engine Troubleshooting tjmaxxx New User Apr 27, 2010, 3:11 PM Post #1 of 3 (1466 views) FAN DO NOT WORK ON HIGH SPEED Sign In I HAVE A 1996 BONNEVILLE PONTIAC FAN DO NOT BLOW ON HIGH SPEED IT"S A MANUAL KNOB TURN TO LEFT TO RIGHT. I REPLACED THE BLOWER RESISTOR SWITCH. STILL THERE'S NO HIGH SPEED. WHAT ELSE COULD BE WRONG 3800 ENGINE (This post was edited by tjmaxxx on Apr 27, 2010, 3:13 PM) nickwarner Veteran / Moderator Apr 27, 2010, 5:34 PM Post #2 of 3 (1456 views) Re: FAN DO NOT WORK ON HIGH SPEED Sign In when you switch your blower to high speed it doesn't use the resistors, but rather triggers a relay to make it so the higher amperage of high speed fan operation doesn't have to pass through the switch. I would check for power to the control side of the relay when switch is in the high position. If you have it, try grounding the ground terminal of the control side.If the fan comes on you need to fix the relay ground. If it doesn't work, replace the relay. Hammer Time Ultimate Carjunky / Moderator Apr 27, 2010, 6:21 PM Post #3 of 3 (1452 views) Re: FAN DO NOT WORK ON HIGH SPEED Sign In Check fuse #3 (30amp) in the Right hand Maxi fuse box on the firewall, above the blower motor, marked "A/C". ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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