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1Quik7D Nov 4th, 01, 1:47 PM My fan switch (70') is acting strange. In the up position (lo) the fan does not blow. Asd I move the lever down one notch at a time, the fan blows faster until I get it in the low position (HI). At the Lo and Hi positions, the fan does not run at all. Shouldnt the fan be off in only one posistion? BB_Mike Nov 4th, 01, 5:48 PM Once the fan goes to full-blast the power comes from a different (full 12 volts) source. There should be a fuse before the heater relay. It's on the fire-wall just above the air routing box. To the left of the A/C boxe if you have on eof this BIG things. Make sure that fuse is good and that it has 12 volts when the car is on. Then it is either the switch in the head unit (try wiggling it side to side for a better contact) or it is that relay on the fire wall. ------------------ 71' 3880# with me. Big Block 402, Merlin oval heads, 10.2:1CR, TH400, 3.73 posi, 1/8th: 8.0 @ 88mph BEST 1/4: 12.5 with 1.89 sixty foot (street tires) BEST MPH: 108mph Picture of me roasting the tires and other guy stuff (http://www.auburnextremeracing.com/drivers/mike/) Video of me staging (smoke of course) (http://www.auburn.edu/~ledfojw/vids/mike_chevelle_burnout.avi) JWagner Nov 4th, 01, 7:40 PM Also, at max blast, the power to the fan goes thru the blower relay. Check the voltage on the terminals on the relay when the switch is set to max. 1Quik7D Nov 4th, 01, 8:36 PM Thanks guys I think the relay is shot! All of the prongs are heavily rusted, so there no way for an electrical current to flow. Cecil Nov 4th, 01, 8:53 PM Actually, I think the fan should even be blowing at the top (lowest) position. I think the only time the fan is off is when the A/C-Heater slider is OFF (all the way to the left, except on my car, new problem to check out!). I had to take my switch apart and clean it up (after tracing wires and banging relays and stuff), then it worked just fine! The relay might be the problem with the HI setting, but I'd bet the switch is the reason for the LO not working... ------------------ Cecil Hawkins San Diego, CA 1971 GMC Sprint The Project (http://www.chevelles.com/showroom/Cecils71Sprint1.jpg) All I need is time...and some $$$ (http://www.chevelles.com/showroom/Cecils71Sprint2.jpg) "Tourist, go home! And take someone with you!" | ||