Whats that relay/switch thingy on my Firewall
Thread Starter
Racer
Joined: Oct 2011
Posts: 294
Likes: 0
From: Easton pennsylvania
Whats that relay/switch thingy on my Firewall
Thats the best way to describe it. It is the engine compartment of my 74 Vert. It is above the heater core pipes on the passenger side. To the left of the hood alarm switch. It is about 1 inch by 3 inches and sticks out of the firewall. It has 4 wires coming from it (Red, Green, Black, Purple) and what looks like a button under a rubber cover. It has a plastic base on it screwed to the car and the unit itself is a silver metal...
Is it a relay of some sort??
Is it a relay of some sort??
Thread Starter
Racer
Joined: Oct 2011
Posts: 294
Likes: 0
From: Easton pennsylvania
Nope. Not from what that pic looks like. The wires go in the back, so I don't see any connections. The rubber button is on the front facing towards the front of the car... Maybe aftermarket?
Le Mans Master
Joined: Aug 2006
Posts: 7,417
Likes: 1,554
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Seat Belt interlock overide.
See P12-43 & P12-62 in you 74 service manual.
Only on 74 & early 75s to make you buckle up before the car would start.
Only on 74 & early 75s to make you buckle up before the car would start.
Melting Slicks
Joined: Mar 2006
Posts: 2,248
Likes: 67
From: Warrington PA
Finalist 2020 C4 of the Year - Unmodified
just as described.....
It is the seat belt interlock as Ed T stated, only as you stated, that is not the correct pic that you are looking for, as that pic probably is without the cover on it. If your seat belts are operating correctly in the 74
they must be connected for the engine to start when a person(s) occupy that seat.
"If Starter Still Will Not Operate:
Set parking brake firmly, move transmission lever to "Park" (reverse for manual transmission cars with clutch fully depressed)
TURN IGNITION KEY TO "ON" ("RUN")
Open hood and press button on manual override switch labeled "START", mounted on bright orange support at rear on engine compartment on passenger side-see illustration.
Close hood, enter car, fasten seat belt and follow normal starting procedures."
The above is from the 1974 Corvette owner's manual, page 7
That is the switch you are referring to, hope this helps........Tom
they must be connected for the engine to start when a person(s) occupy that seat.
"If Starter Still Will Not Operate:
Set parking brake firmly, move transmission lever to "Park" (reverse for manual transmission cars with clutch fully depressed)
TURN IGNITION KEY TO "ON" ("RUN")
Open hood and press button on manual override switch labeled "START", mounted on bright orange support at rear on engine compartment on passenger side-see illustration.
Close hood, enter car, fasten seat belt and follow normal starting procedures."
The above is from the 1974 Corvette owner's manual, page 7
That is the switch you are referring to, hope this helps........Tom
Last edited by 74 LS4-454; Jan 6, 2012 at 09:59 PM.
Thread Starter
Racer
Joined: Oct 2011
Posts: 294
Likes: 0
From: Easton pennsylvania
Ahhh, you are very right! Now that I saw other pics, it sure is the seatbelt relay..
I want to remove it or just move it to another location. I am trying to clean up the engine bay and it looks silly... So my car starts fine. No seat belt needed. Can I remove it?? And if so, what can I do, snip the wires off and take it off the firewall?
Since it starts, does that mean it was already bypassed??
I want to remove it or just move it to another location. I am trying to clean up the engine bay and it looks silly... So my car starts fine. No seat belt needed. Can I remove it?? And if so, what can I do, snip the wires off and take it off the firewall?
Since it starts, does that mean it was already bypassed??
Melting Slicks
Joined: Mar 2006
Posts: 2,248
Likes: 67
From: Warrington PA
Finalist 2020 C4 of the Year - Unmodified
Ahhh, you are very right! Now that I saw other pics, it sure is the seatbelt relay..
I want to remove it or just move it to another location. I am trying to clean up the engine bay and it looks silly... So my car starts fine. No seat belt needed. Can I remove it?? And if so, what can I do, snip the wires off and take it off the firewall?
Since it starts, does that mean it was already bypassed??
I want to remove it or just move it to another location. I am trying to clean up the engine bay and it looks silly... So my car starts fine. No seat belt needed. Can I remove it?? And if so, what can I do, snip the wires off and take it off the firewall?
Since it starts, does that mean it was already bypassed??
I still have mine intact and plan to keep that way. but I imagine you could disconnect it from the engine bay without any problems, or just leave it unplugged as it probably is now.
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
Ahhh, you are very right! Now that I saw other pics, it sure is the seatbelt relay..
I want to remove it or just move it to another location. I am trying to clean up the engine bay and it looks silly... So my car starts fine. No seat belt needed. Can I remove it?? And if so, what can I do, snip the wires off and take it off the firewall?
Since it starts, does that mean it was already bypassed??
I want to remove it or just move it to another location. I am trying to clean up the engine bay and it looks silly... So my car starts fine. No seat belt needed. Can I remove it?? And if so, what can I do, snip the wires off and take it off the firewall?
Since it starts, does that mean it was already bypassed??
If you want to keep it, follow the pics to bypass and no one can tell.
I wouldn't butcher a possibly good and pricey relay.
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