could some one tell me what these are and what they do.
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don't know what they are, but i fixed the pic for you![]()
on the passenger side of the fire wall there are three relay looking things. what are these things for?
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relays...
Looks like triple TCS...
wilma
Looks like triple TCS...
wilma
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The 2 on the far left looks like circuit breakers to me, the next one looks to be a map sensor for the efi swap.
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Tcs..
The relays in your photo look very similar to the TCS relay...I was just being funy with the triple TCS comment...good luck.
wilma
TCS stands for Transmission Controlled Spark...GM started using this in 1970. That relay was riveted to the rain gutter and the wiring ran to a switch on the tranny and to a vacuum solenoid on the intake manifold. The system only allowed for full vacuum advance when the car was in high gear...this was an early smog control device.
The relays in your photo look very similar to the TCS relay...I was just being funy with the triple TCS comment...good luck.
wilma
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