Power top switch hot all the time? - Chevelle Tech
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post #1 of 14 (permalink) Old Jun 29th, 20, 12:10 AM Thread Starter
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Vern
 
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Power top switch hot all the time?

Just got around checking out my 69 Chevelle convertible. My power top is wired hot all the time. In other words you do not have to turn on the ignition to lower the top or raise it. Is that the way they were from the factory?
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post #2 of 14 (permalink) Old Jun 29th, 20, 12:25 AM
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Re: Power top switch hot all the time?

Yes, it ties into the horn relay bussbar for power which is hot all the time.
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post #3 of 14 (permalink) Old Jun 29th, 20, 12:55 AM Thread Starter
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Vern
 
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Re: Power top switch hot all the time?

Hey thanks Dutch. So where is the horn relay bussbar?
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post #4 of 14 (permalink) Old Jun 29th, 20, 1:08 AM
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Re: Power top switch hot all the time?

Horn relay is behind the left front headlight on the inside of the rad support. From there a power wire, I think red or orange, goes to a circuit breaker mounted on the firewall near the brake booster. Then from there to the top switch.
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post #5 of 14 (permalink) Old Jun 29th, 20, 1:52 AM Thread Starter
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Vern
 
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Re: Power top switch hot all the time?

OK that is how mine is wired, the red wire from the horn relay looks like an after thought, not part of the loom. Thanks Dutch. This is going to be my sons car, he lives in Ventura, Ca.
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post #6 of 14 (permalink) Old Jun 29th, 20, 8:25 AM
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Re: Power top switch hot all the time?

I think the reason for it being wired hot all the time is so the top can be put up at any time without the key, in case of unexpected rain. At a car show a couple of years back me and my wife were out looking at the other cars and a shower popped up. I was quickly heading back to get the top up, but a friend that was parked next to us already had it up. I was glad that the GM engineers had designed it that way. Otherwise I would of had a soaked interior.

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post #7 of 14 (permalink) Old Jun 29th, 20, 10:54 AM Thread Starter
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Vern
 
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Re: Power top switch hot all the time?

Well that makes sense, then that is the way it will stay. I wonder if that circuit breaker Dutch mentioned on the fire wall works? What size is it? {amp wise)
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post #8 of 14 (permalink) Old Jun 29th, 20, 11:56 AM
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Re: Power top switch hot all the time?

Also if you look below the brake booster or master cylinder you will see where the main lead from the horn relay connects to a 30 amp breaker and then it goes through the firewall. Just extra info if you ever need to make a repair or troubleshoot.
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post #9 of 14 (permalink) Old Jun 29th, 20, 1:09 PM Thread Starter
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Vern
 
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Re: Power top switch hot all the time?

Yes I found the breaker, think I have a new 30 amp. The 12 gauge brass connectors in the firewall junction box are bad so I will have to visit NAPA this morning. My car won't start unless I hot wire it. Loosing 5 volts through that connector.
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post #10 of 14 (permalink) Old Jun 30th, 20, 11:22 AM
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Re: Power top switch hot all the time?

Quote:
Originally Posted by suntreemcanic View Post
Yes I found the breaker, think I have a new 30 amp. The 12 gauge brass connectors in the firewall junction box are bad so I will have to visit NAPA this morning. My car won't start unless I hot wire it. Loosing 5 volts through that connector.
That 30 amp breaker only protects the wiring to the convertible top pump. It will not affect your starting at least not on my 68 and I am sure 69 would be the same. Power to the ignition goes through the bulkhead connector
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post #11 of 14 (permalink) Old Jul 2nd, 20, 1:30 AM
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Re: Power top switch hot all the time?

I was looking at a 70 wiring diagram aNd it shows an ignition switch relay between the circuit breaker and the power top switch. So I checked a few 69 wiring diagrams and none show an ignition switch relay in the power line to the top switch. So for 69, the power top switch is hot without the ignition on and for 70 the ignition must be on to activate the power top motor.
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post #12 of 14 (permalink) Old Jul 13th, 20, 9:00 PM
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Re: Power top switch hot all the time?

I have a '70 rag and the top switch is hot ALL the time.....
DK
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post #13 of 14 (permalink) Old Jul 13th, 20, 9:51 PM
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Re: Power top switch hot all the time?

Quote:
Originally Posted by CHEVYKRAFT View Post
I have a '70 rag and the top switch is hot ALL the time.....
DK
Same here

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post #14 of 14 (permalink) Old Jul 14th, 20, 6:55 AM
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Re: Power top switch hot all the time?

I don't know if it's correct or not but mine is hot all the time.

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