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-   -   1974 Fuse Box Diagram (https://www.corvetteforum.com/forums/c3-tech-performance/2639099-1974-fuse-box-diagram.html)

joez74 07-16-2010 09:55 AM

1974 Fuse Box Diagram
 
Anyone have a picture and/or diagram of the fuse box inside the car. I am blowing the 20A fuse right below the "gauges" fuse, but on my box the name for that fuse is broke off so I don't know what it is. :cheers:

...Roger... 07-16-2010 10:32 AM

thats the RADIO-TCS sol fuse
how do you know when its blown-what is not working ?

joez74 07-16-2010 12:46 PM


Originally Posted by ...Roger... (Post 1574715393)
thats the RADIO-TCS sol fuse
how do you know when its blown-what is not working ?

Here's the story, I did a complete interior gut out and replaced everything. So I wired my aftermarked radio to a yellow wire in the dash that I tested as hot when the ignition was on, cold when off. Tested it several times with no issues, played great.

A couple of days ago I go out than turn the ignition to show a friend the radio and it has no power. I look at the fuse box and that fuse in question is fried. I disconnect the negative terminal on the battery, change the fuse, reconnect negative and instantly the fuse is fried again. I disconnected the radio wiring from that yellow wire and tried changed the fuse again, bam, same result.

So something is overloading that fuse, I just don't know what. And what is the TCS sol???

...Roger... 07-16-2010 03:23 PM

TCS= transmission controlled spark=emission crap (IMO)
On that fuse is radio,TCS wiring,relay,solenoid etc,hood scoop fresh air fooler solenoid and pedal switch.
Bubba's wire cutters will clean that circuit up nicely. :yesnod:

edit- carb solenoid is also on that circuit.

joez74 07-16-2010 03:49 PM


Originally Posted by ...Roger... (Post 1574718401)
TCS= transmission controlled spark=emission crap (IMO)
On that fuse is radio,TCS wiring,relay,solenoid etc,hood scoop fresh air fooler solenoid and pedal switch.
Bubba's wire cutters will clean that circuit up nicely. :yesnod:

edit- carb solenoid is also on that circuit.

Thanks Roger!

Paul L 07-16-2010 04:33 PM


Originally Posted by ...Roger... (Post 1574718401)
TCS= transmission controlled spark=emission crap (IMO)
On that fuse is radio,TCS wiring,relay,solenoid etc,hood scoop fresh air fooler solenoid and pedal switch.
Bubba's wire cutters will clean that circuit up nicely. :yesnod:

edit- carb solenoid is also on that circuit.

Yes, the TCS solenoid looks like this. I have never figured out how it works so it is basement inventory. But if the Smog Police strike I will have it.

Forget the POR-15 black heat paint, everything on that #340261 1974 intake manifold is absolutely stock and emissions-compliant.

http://img.photobucket.com/albums/v1...y97/TCSB-1.jpg


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