December 29, 201015 yr '88 GL- My heater blower moter works on 1-2-3 but not on the high setting. Is that a bad switch or something else in the system.
December 29, 201015 yr Yep, fan switch. Read all about it here: http://www.ultimatesubaru.org/forum/showthread.php?t=118301
December 30, 201015 yr I inherited a car with non working 3 and 4 speeds, but the resistor was intact (and speed 4 doesn't use it anyway). Turns out that the fan was dying and the increased electrical load caused the switch to get hot enough that the wires had unsoldered from the switch. New blower fan + re-soldered wires -> problem solved.
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