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Discussion Starter · #1 ·
Here's one for you guys. I've recently picked up a 70 velle. It has sat since 1993, but only has 43+k miles on it. The engine, trans, interior/wiring seem flawless but I do have a electrical problem I'm chasing.

The horn relay buzzes when the car is not running and you open the door. If I push the dome light switch in it stops, if I start the car it stops. It does it with the key in or out of the ignition switch. Since it had the original relay and voltage regulator, I replaced them with new ones (I kept the idle of course), and of course it has a new battery in it, but it still does it. the only other thing that seems to be wrong is that I have no high speed blower and the idle is set so low that the alternator light flickers on of unless you apply a little gas. The low speed and middle speed blower fan settings work fine!

I'm stumped, short in the dome light circuit? but the dome light works fine, all lights, accessories work, the horns work! event the dash clock and fuel gauge work perfectly!!

any ideas??

thanks in advance for your consideration

ProfSS i.e., rick
 

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Congratulations!! Your car is working almost perfectly. You have found the buzzer (anemic as it is)Sounds like you have to isolate a bad door switch or key switch to shut off the thing or remove the wire that drives the buzzer.
 

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I've gathered from previous posts here that a bad ground will cause all sorts of crazy things to happen to your electrical system. Anyone else? Good luck!
 

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NNNOOOO!!! back up. the horn relay is sensing a ground thru the key in Ign switch.
Supposed to work like this. When key is in Ign a switch in the column closes and with the door switch completes a circut to energize the buzzer. Either removing the key or closing door breaks the circut.
You already know the door switch is good because 1. the lights come on 2. The buzzer stops when door closed.
Look in the service manual under steering columns and it should show you how to R&R this switch. It's under the turn signal switch on the right side of the shaft in line with the Ign cylinder.
BTW the purpose of this switch was to remind you your key was still in the Ign while you slam the door shut.

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Philip Mullaly
72 TPI El Camino
Why do the job only once?
I'm usually quicker the third time :)
 

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High speed fan is controlled by a relay on the ac box. The relay gets its power from a separate wire with an inline fuse. The fuse is located close to the relay on the firewall. Ckeck this fuse and the wire connection at the radiator support battery terminal block. If these are good you may have a bad relay.

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Steve Strasemeier (70SS 396, Fathom Blue/White Stripes)




[This message has been edited by Steve S (edited 09-28-2000).]
 

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Heck, I just unplugged the wire!
 

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Ditto here with unplugging the wire. Plus I have the added "benefit" of being able to remove the key with the car running.
But I have plans on eventually replacing the ign switch.

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Better Late than Never Fred
Team Chevelle #400
ACES #4055
I know exactly where I'm at! I've been lost here before!
1970 Chevelle Malibu
 

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Before you remove the switch try squirting a little spray lube into it and work the key in and out. It may release the stuck lever that closes the contacts. if that doesn't do it you need a new switch. here is a photo of where to remove the flashing to release the old one. After the flashing has been removed you will need a small pointed tool to depress the spring loaded retainer. You will be able to feel it push down then pull the switch out. The service manual has a good step by step on getting all the other stuff out of the way, so I won't go into that. this pic is a non tilt column. If you have a tilt I can post a different picture.

shoot forgot to post the pic



[This message has been edited by 64elcamino (edited 09-28-2000).]
 

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Also, if you look close at the picture, it helps to have a couple of BFH'S!
 

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Discussion Starter · #10 ·
WOW... super information. Thanks guys. tis had me nuts!!! I have a mile long honey-do list and somehow got volunteered to help brother-in-law frame up a rec room in his basement this weekend.
But as soon as I get a chance I'll try all your suggestions and let you know how it works.


thanks guys

rick
 

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Jerry, those are the small ones
The big ones won't fit in the box

[This message has been edited by 64elcamino (edited 09-29-2000).]
 
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