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11-07-2018, 08:14 PM
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#1 |
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Registered User
Join Date: Nov 2017
Location: Anthem AZ
Posts: 281
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Relay on Firewall
We just bought this truck about a year ago, and where the ac recirculation cable goes thru the grommet on the firewall going out towards the passenger side, there is what looks like some type of relay. Can anyone tell me where this really belongs?
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11-07-2018, 08:29 PM
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#2 |
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Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,662
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Re: Relay on Firewall
Probably for the TCS system
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72 C10 lwb fleetside -stock 350/350 combo |
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11-07-2018, 08:36 PM
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#3 | |
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Registered User
Join Date: Nov 2017
Location: Anthem AZ
Posts: 281
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Re: Relay on Firewall
Quote:
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11-07-2018, 09:07 PM
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#4 |
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Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,662
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Re: Relay on Firewall
Transmission Controlled Spark. It was an early attempt to control emissions. What it does is restrict the vacuum advance from working until the engine is fully warmed up and the transmission is in high gear. You can get rid of it, it serves no good purpose.
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72 C10 lwb fleetside -stock 350/350 combo |
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