Blower speed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jradford · 07-09-2018, 07:50 PM

Here's an odd ball one for you. Replaced the fan speed switch and the high speed relay. The connector was burned up so replaced it as well. Put heavier wires than what came in it since the plug from LMC used 14-16 awg to splice to a 10-12 awg for the purple and orange wires. Now the high speed and medium fan speeds work but no low speed. Thought the medium ad low were on the same circuit. Any ideas?

**dmjlambert** · 07-09-2018, 08:21 PM

Low and medium speeds use the resistor assembly that is in the heater case. Check that out.

07-09-2018, 07:50 PM	#1
jradford Registered User Join Date: Feb 2018 Location: gilmer tx Posts: 75	Blower speed Here's an odd ball one for you. Replaced the fan speed switch and the high speed relay. The connector was burned up so replaced it as well. Put heavier wires than what came in it since the plug from LMC used 14-16 awg to splice to a 10-12 awg for the purple and orange wires. Now the high speed and medium fan speeds work but no low speed. Thought the medium ad low were on the same circuit. Any ideas?

07-09-2018, 08:21 PM	#2
dmjlambert Senior Member Join Date: Apr 2016 Location: Cypress, TX Posts: 3,561	Re: Blower speed Low and medium speeds use the resistor assembly that is in the heater case. Check that out.



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