kjlj

Unfortunately I have had some water behind my firewall due to a clogged drain. This probably has loaded up and may be damaged the fan. Good news, the drain plug is no longer clogged. Bad news, my fan only works on #5. Any ideas? Possible fuse? May be it will work after drying out.?

Thanks.
Keith

BNaylor

If you have a manual HVAC system, it's classic blower motor resistor. Water leaking in through bad cowling seal, etc. will drip down onto the blower motor, blower motor resistor and wiring. Positions 1 - 4 from the HVAC head unit feeds to the resistor matrix to vary the blower motor speed. In position 5 the resistor is bypassed and the blower motor is fed direct battery power via the HVAC HI speed relay so the blower itself is probably OK.

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'08 Pontiac Grand Prix GXP - LS4 5.3L V8
'02 Oldsmobile Alero GL2 - LA1 3400 V6
'01 Buick Regal GS - L67 Series II 3800 V6 Supercharged
'99 Buick Regal LS - L36 Series II 3800 V6
'03 Honda CR250R MX - 2 Stroke 250cc
'97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged
Timeslip 08/12/06

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thermal izod

had the same thing in my 2000 last year...bnaylor3400 is 100% dead on