Name this relay - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SS Tim · 05-06-2014, 01:02 AM

Located above your disconnected horn relay is the TCS (Transmission Controlled Spark) timing relay. As far as being redundent, that would all depend on how complete and functional your truck is. The system explanation is a little better in the 72 service manual than the 71.

LOW DOUGH · 05-06-2014, 09:19 AM

Quote:

Originally Posted by SS Tim

Located above your disconnected horn relay is the TCS (Transmission Controlled Spark) timing relay. As far as being redundent, that would all depend on how complete and functional your truck is. The system explanation is a little better in the 72 service manual than the 71.

Thanks. I was just curious. My truck is not complete as in it's not original. It seems to have all been peaced together. I think the cab is a 72 because of the things a 72 had different from the other years.

Also I need to fix the horn button. That's why the horn relay is unplugged.

05-06-2014, 01:02 AM	#1
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,507	Re: Name this relay Located above your disconnected horn relay is the TCS (Transmission Controlled Spark) timing relay. As far as being redundent, that would all depend on how complete and functional your truck is. The system explanation is a little better in the 72 service manual than the 71. Attached Images __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban Last edited by SS Tim; 05-06-2014 at 01:14 AM.



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