The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Help!- No high speed on blower motor

70 RatRocket · 10-22-2003, 10:09 PM

My 70 has factory a/c. I have low and medium speeds on the blower but no high speed on a/c or heat. When I put it on high it drops back to a low speed. I have replaced the relay and the fan switch. There is a feed to the relay on the single orange wire when I turn it on high, even tried another relay with the same results. What should I try next? Thanks for any help. Dave

10-22-2003, 10:09 PM	#1
70 RatRocket Registered User Join Date: Oct 2002 Location: Nebraska Posts: 39	Help!- No high speed on blower motor My 70 has factory a/c. I have low and medium speeds on the blower but no high speed on a/c or heat. When I put it on high it drops back to a low speed. I have replaced the relay and the fan switch. There is a feed to the relay on the single orange wire when I turn it on high, even tried another relay with the same results. What should I try next? Thanks for any help. Dave __________________ 1970 Chevy SWB 4x4 1970 Chevelle SS 454 1972 Chevelle Heavy Chevy 1950 Ford Convertible 2001 Chevy HD2500 4x4