One more ? Key hole ???

[Scott>72-GMC]

What could this key hole go to ( under gas cap on the cab) anyone know??
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[jocko]

I believe it is a security thingy... I've seen them mounted on fenders, look just like an additional keyhole. Used to be popular until crazy giant metal bars that make it impossible to turn the steering wheel came out.

[Scott>72-GMC]

That makes sence I knew it couldn't go to the gas tank but had no idea. I'm only 22 so that era is a little over my head lol
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[SS Tim]

Actually that would be a good location for that type of alarm arming switch. Here is a picture of a reproduction Corvette switch that may very well have been installed. However the barrel key switches were also popular for aftermarket installations.

[norske]

I have one above the gas cap. There's wires hanging from it on the inside. Old school alarm, dealer installed I think.

[kelsfine69]

That might be a camper plug

[mrein3]

Back in the day the switches like SS Tim showed were a decent theft deterrent. Before cars came with alarms from the factory, here is what my Dad used to do:

Take 12V off the dome light (sorry to all you guys without dome lights, this won't work). Run that 12V to that switch. From the other side of the switch run a wire to a spot close to the horn under the hood. You need a relay, a flasher, and some heavy wire. You want to rig the relay so when the contacts close in the relay, 12 volts goes to the horn through the relay.

When unarmed the horn and dome light work as usual. When Mr. Crook opens the door and energizes the dome light, that relay clicks and
HONK HONK HONK HONK HONK HONK HONK
until you go shut it off.

The trick then is to leave your wing vent unlatched. That way Mr. Crook pushes open your unlatched wing - not breaking it - reaches in and rolls down the window, unlatches the lock, opens the door,
HONK HONK HONK HONK HONK HONK HONK
You wake up happy in knowing your truck is safe and a crook out there needs a change of underpants.

For all you twenty nothings out there with remote clickers and whizz-bang alarms we would call this old school.

[Ironangel]

Originally Posted by mrein3

Back in the day the switches like SS Tim showed were a decent theft deterrent. Before cars came with alarms from the factory, here is what my Dad used to do:

Take 12V off the dome light (sorry to all you guys without dome lights, this won't work). Run that 12V to that switch. From the other side of the switch run a wire to a spot close to the horn under the hood. You need a relay, a flasher, and some heavy wire. You want to rig the relay so when the contacts close in the relay, 12 volts goes to the horn through the relay.

When unarmed the horn and dome light work as usual. When Mr. Crook opens the door and energizes the dome light, that relay clicks and
HONK HONK HONK HONK HONK HONK HONK
until you go shut it off.

The trick then is to leave your wing vent unlatched. That way Mr. Crook pushes open your unlatched wing - not breaking it - reaches in and rolls down the window, unlatches the lock, opens the door,
HONK HONK HONK HONK HONK HONK HONK
You wake up happy in knowing your truck is safe and a crook out there needs a change of underpants.

For all you twenty nothings out there with remote clickers and whizz-bang alarms we would call this old school.

Good idea! My 72 dont have a door activated dome light, only at the switch. Are they all like this or was that an option?

[Scott>72-GMC]

I love it
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[special-K]

I would put those on the driver side fender just below the back of the fender badge. I thought it looked kind of like the "r" you'd see for "registered trade mark" under logos. It was one of those tasteful and acceptable necessary evil holes you'd drill i your primo ride. Hey,a little 1/2" hole beats a burnt stripped hulk.

[SS Tim]

Originally Posted by Ironangel

Good idea! My 72 dont have a door activated dome light, only at the switch. Are they all like this or was that an option?

The door operated dome lamp was an option (RPO C80) on the base trucks and included with all the other trim levels. However it will be often seem on the SPID.
It should not be hard to add the two grounding switches at the doors. If you have not yet done so download the manuals for your truck and check the schematics to see how it is run.

Originally Posted by special-K

I would put those on the driver side fender just below the back of the fender badge. I thought it looked kind of like the "r" you'd see for "registered trade mark" under logos. It was one of those tasteful and acceptable necessary evil holes you'd drill i your primo ride. Hey,a little 1/2" hole beats a burnt stripped hulk.

Too true. It sure would have been great having a unibit when I had to drill them.

[special-K]

Originally Posted by SS Tim

Too true. It sure would have been great having a unibit when I had to drill them.

That's true,but I meant a 1/2" hole beat a stolen vehicle.

[Scott>72-GMC]

Could get away with one in plain sight now days cause obviously from my unknowing they are a forgotten thing mostly. I think I'll try to get a new one I have a key to and keep it
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[SS Tim]

Originally Posted by Scott>72-GMC

Could get away with one in plain sight now days cause obviously from my unknowing they are a forgotten thing mostly. I think I'll try to get a new one I have a key to and keep it
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Here is Paragon's page for it. Granted it is a reproduction Corvette expensive but for an active alarm system it is a good option and period.

http://www.paragoncorvette.com/p-351...ey-switch.aspx

[Scott>72-GMC]

Awesome!! I apriciate it
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[pritch]

The PO that added a similar system to my Panel put switches on each door, the barn doors in the rear and on the hood. All the parts are long gone except for the key switch and the plunger switches. And no, I don't have the key

[SS Tim]

Pretty sure Lock Doc Leon could fix you up!

[pritch]

Originally Posted by SS Tim

Pretty sure Lock Doc Leon could fix you up!

That's what I'm hoping for, when the time comes!