adding heated mirrors

Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's, Olds 98 91-96, Buick Lesabres and Park Avenue 91-96. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.
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human
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Re: adding heated mirrors

Post by human »

Chances are the extra wires aren't there if the car didn't have the mirror upgrade from the factory. GM almost never included an inch of wiring they didn't absolutely have to.
Daily Driver: 2011 Chevy Impala LT
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Woosch
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Re: adding heated mirrors

Post by Woosch »

human wrote:Chances are the extra wires aren't there if the car didn't have the mirror upgrade from the factory. GM almost never included an inch of wiring they didn't absolutely have to.
You're correct. The wiring harness in my SE (non-heated power windows) is missing the positive lead for the heated mirrors. :banghead: Strangely, my car's power mirror harness has an extra black (ground) wire that isn't used on my power mirrors.
'96 L36 Bonneville SE, 95k miles (leather) 17" SLE rims
'95 L36 Olds 88 (leather) (x2) (both sold)
'91 Olds 442 w-41 (1 of 204): '79 Olds Holiday 88 coupe. Factory buckets, console
1958 Impala Coupe 348 75k miles
1958 Impala convertible 283, 51k miles
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95se
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Re: adding heated mirrors

Post by 95se »

so the wire its missing is the power wire from the defrost button?
1995 se
128,101
custom FWI
rt-95 rims look kinda like crosslaces
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96-99 headlight conversion, clear markers
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Woosch
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96 Bonneville SE
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Re: adding heated mirrors

Post by Woosch »

95se wrote:so the wire its missing is the power wire from the defrost button?
It appears so. I wasn't able to trace the wire on the junkyard car back to see where it goes. The unused wire in my car's power mirror wiring harness is a ground. Do the two mirror defrost power wires (one on each side) run from the mirror directly to the back of the ECC? Shouldn't there be a relay in that circuit?
'96 L36 Bonneville SE, 95k miles (leather) 17" SLE rims
'95 L36 Olds 88 (leather) (x2) (both sold)
'91 Olds 442 w-41 (1 of 204): '79 Olds Holiday 88 coupe. Factory buckets, console
1958 Impala Coupe 348 75k miles
1958 Impala convertible 283, 51k miles
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95se
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Re: adding heated mirrors

Post by 95se »

Not sure with the ecc but on my with the standard climate control its wired in a relay under the dash.
1995 se
128,101
custom FWI
rt-95 rims look kinda like crosslaces
6000k hids
f- body muffler dual output
96-99 headlight conversion, clear markers
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95naSTA
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Re: adding heated mirrors

Post by 95naSTA »

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Same pin as the rear defrost but through a 10A fuse.
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