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1974 454 engine bay wiring

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Old 08-13-2017, 08:56 PM
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bballboy06
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Default 1974 454 engine bay wiring

I have some connections that i have no idea what they are for. Engine runs fine with no issues currently. Just looking to see if these are needed at all for anything.

1. This wire is up next to the firewall ( Brown, green and black wire)
2. This connection is down next to the alternator
3.This connection is coming out of the firewall ( Pink and Green wire)
4. Connection is long and just one wire comes from centerish of the firewall
5. Connection is right next to the master cylinder

Pictures should be in order as above

Thanks for any help
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Old 08-13-2017, 09:58 PM
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A C
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Can't answer for the other ones, but the third pic looks like the backup switch harness which should connect to a switch on the transmission.

Last edited by A C; 08-13-2017 at 09:59 PM. Reason: Image too large
Old 08-14-2017, 08:51 PM
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bballboy06
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ttt
Old 08-14-2017, 10:38 PM
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Revi
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Photo #4 is for the TCS system, there's a single pin switch on the transmission.

Last edited by Revi; 08-14-2017 at 10:39 PM.
Old 08-15-2017, 05:04 PM
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vette8121
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Originally Posted by Revi
Photo #4 is for the TCS system, there's a single pin switch on the transmission.
#1 TCS Solenoid if the black wire would change color to Blue
#2 Hood door (cowl induction)
#3 Back-up light switch
You have #4
Old 08-15-2017, 05:12 PM
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Originally Posted by bballboy06
I have some connections that i have no idea what they are for. Engine runs fine with no issues currently. Just looking to see if these are needed at all for anything.

1. This wire is up next to the firewall ( Brown, green and black wire)
2. This connection is down next to the alternator
3.This connection is coming out of the firewall ( Pink and Green wire)
4. Connection is long and just one wire comes from centerish of the firewall
5. Connection is right next to the master cylinder

Pictures should be in order as above

Thanks for any help
Sorry I missed #5, looking at the inside it looks like a headlight warning switch but it's in the wrong place!

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