Convertible Top Switch - Chevelle Tech
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post #1 of 42 (permalink) Old Jun 30th, 15, 10:27 AM Thread Starter
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Don
 
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Convertible Top Switch

Looks like my convertible didn't like coming out of it's resting place... top switch stopped working after I raised it last weekend. I did some looking around and searching on the site and it sounds like the switch is bad, but the motor is what took it out. One post I read talked about the Fisher Body Folding Top Manual but I can't find where to buy one for a 1972 Chevelle. Anyone know where to go for that?

Also another thread was about someone on the forum who built a plug and play in-line relay to take the load off the switch. I'm going to do this, just makes sense... anyone know where I can buy the 3-prong male and female wiring harness connector for the top switch?
Thanks,

Don
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post #2 of 42 (permalink) Old Jul 1st, 15, 1:32 AM
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Re: Convertible Top Switch

Don,

The "Fisher Body Service Manual" for 1972 GM Vehicles has a 59 page section covering the complete service and adjustment procedures for all GM convertible tops including model specific information. It covers everything from troubleshooting, maintenance, and lubrication, to complete top replacement procedures. This book is in reprint from many part suppliers and is well worth the cost. It also has several hundred pages of must have information for other parts of the car IE: Window adjustment, Doors, Sheet metal, Electrical, Etc.
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post #3 of 42 (permalink) Old Jul 1st, 15, 1:39 AM Thread Starter
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Re: Convertible Top Switch

Yep, I have the manual, in one of the posts I read it referred to a folding top manual. Although they said 1971 in the post, I figured they may have one for a '72 also. I'll have to go back and reread the posts... May take awhile to find it again and make sure I read what I thought I read.
Thanks for the info,
Don

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post #4 of 42 (permalink) Old Jul 3rd, 15, 5:22 PM
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Re: Convertible Top Switch

i have burnt out 3 new switches on the convertible and just waiting for the right time to add a relay to the a new switch.

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post #5 of 42 (permalink) Old Jul 3rd, 15, 6:48 PM Thread Starter
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Re: Convertible Top Switch

I found a place that sells the female connect as part of the wiring harness. I sent them a email to if they gave the male connector. If they do, it won't take much to assemble and install.

Don
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post #6 of 42 (permalink) Old Jul 4th, 15, 2:20 PM
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Re: Convertible Top Switch

I saw this thread and wanted to throw this out (and maybe it's already been though of) but does the pump motor have a two wire single connector quick disconnect like below ?

https://www.flickr.com/photos/121766...7655036244258/



If so, could you order some of these parts to where with new wire, connectors, and housings, be able to make your own plug and play setup ?

https://www.flickr.com/photos/121766...7655036244258/



By putting the relays and connections in back, if the factory ran a bare minimum sized wire to the motor, you could then be running a larger wire to some relays and then to the short wires off of the pump limiting any voltage drops.

It looks like the indash switch throws power down one wire to get the pump to rotate one way and then if that wire is not connected and the other wire powered up, the motor would spin the other way.

Jim
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post #7 of 42 (permalink) Old Jul 4th, 15, 9:39 PM Thread Starter
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Re: Convertible Top Switch

The switch has a center position wire for power in and the otter two for power the pump up or down depending on the switch position. If I were to put the relays back at the pump, I would have to run another set of heavy guage wires back to the pump for the relay to power the relay with the original wires providing the 'switch leg' to them

Don
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post #8 of 42 (permalink) Old Jul 5th, 15, 2:21 PM
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Re: Convertible Top Switch

Quote:
Originally Posted by MidLife72 View Post
The switch has a center position wire for power in and the otter two for power the pump up or down depending on the switch position. If I were to put the relays back at the pump, I would have to run another set of heavy gauge wires back to the pump for the relay to power the relay with the original wires providing the 'switch leg' to them
I have to wonder how over designed the original wiring is. It might have been marginal to start with and by putting the relays next to the pump and a new large enough power wire going to the battery, then things might work better. Pump motors can wear out needing more amperage as well as tops coming out of adjustment making the pump draw more power.

You could put the relays up front and use all of the factory wiring to trigger the relays but if the wire between the switch and the pump is marginal, then the switch will probably no longer burn out but the motor would still be seeing a voltage drop through marginally sized factory wires run from front to back.

If you are concerned about seeing this new power wire run to the battery or having it tied into as close as you can to a constant 12 volts, then I believe there are unused spots in the bulkhead connector to where a person could get the right parts to pass the circuit through the bulkhead and then put it in the loom going along side the starter solenoid wire and then put in a fusible link on the end of the wire and connect it to the large post that the battery cable is attached to on the starter solenoid.



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post #9 of 42 (permalink) Old Jul 5th, 15, 4:29 PM Thread Starter
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Re: Convertible Top Switch

That looks like a good solution if I can't find the male 3-prong connector.... Or make one using the old switch and bench top work. The circuit is protected with a 30 amp fuse/circuit breaker and the wires look to be 10ga so they're designed to carry the load. I'm just trying to keep the wiring factory as much as I can and if I ever want to take the relays out its as simple as unplugging it and re-connecting the original wiring.

Don
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post #10 of 42 (permalink) Old Jul 5th, 15, 8:46 PM
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Re: Convertible Top Switch

I was googling things and found this but I don't know if your car is setup this way. It looks like this harness extension/adaptor has the three stud connector and then a ways down has a more traditional 3 wire connector.



If this is the case, then you could use these three terminal sockets and plugs:



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post #11 of 42 (permalink) Old Jul 5th, 15, 9:00 PM Thread Starter
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Re: Convertible Top Switch

Yes, it's the one in the first pic. I found that at hydro-electric. I sent a email to them to see if they had the male connector... Just waiting to hear back hopefully to the positive.
Thanks for digging up the others though.

Don
'72 Malibu Convertible
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post #12 of 42 (permalink) Old Jul 5th, 15, 11:35 PM
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Re: Convertible Top Switch

Quote:
Originally Posted by MidLife72 View Post
Yes, it's the one in the first pic. I found that at hydro-electric. I sent a email to them to see if they had the male connector... Just waiting to hear back hopefully to the positive.
Thanks for digging up the others though.
Hopefully I helped a little as I'm just not familiar with the Chevelles (but the Nova's I am familiar with). The connectors I showed I had ordered for use on a customer's car and they worked out well.

Good luck with your project and post pictures when you do the work.

Jim
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post #13 of 42 (permalink) Old Jul 7th, 15, 12:07 AM
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Re: Convertible Top Switch

here is the schematic for the 5 pin relay installed under the dash.
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wambams69ss396
69ss396 chevelle HT
57E fathom green
bench seat w/dark green interior
396 325hp
3.73 posi
http://i492.photobucket.com/albums/r...pszhp1iwhw.jpg
69SS396 chevelle convertible
71A lemans blue
bench seat w/parchment interior
http://photobucket.com/69chevelleconvertible
TC#3512
Billy M
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post #14 of 42 (permalink) Old Jul 7th, 15, 12:19 AM Thread Starter
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Re: Convertible Top Switch

Thanks for the schematic... What did you use for the connection into the harness connectors?

Don
'72 Malibu Convertible
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post #15 of 42 (permalink) Old Jul 7th, 15, 1:50 AM
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Re: Convertible Top Switch

i have not done this as of yet.But i have already cut into the wiring harness about 5" from the switch.so this is where i will be splicing into the harness with the relays.
long story short when i finished with the restoration on the convertible the switch worked for a only short time.when i took apart the dash to remove the switch, i thought the three prong connection at the end of harness was the problem.so when i installed switch #2 i removed that end of the harness and made my own connection to the back of the switch.it did not take long for me to find out that the connection was not the problem and for switch #2 to fail.with switch #3 i reinstalled the switch connection end back onto the harness but only to have the switch go bad once again...........
So pi--ed off at this point.taking apart the dash 3 times is no fun to get to the switch only to have it burn out.that is when i did some reading and found a thread on the 5 pin relay.i have all the parts to do it for the FOURTH time but i don't really feel like taking apart the dash again.so it sits an waits until i muster the courage to dive under the dash.


Billy

wambams69ss396
69ss396 chevelle HT
57E fathom green
bench seat w/dark green interior
396 325hp
3.73 posi
http://i492.photobucket.com/albums/r...pszhp1iwhw.jpg
69SS396 chevelle convertible
71A lemans blue
bench seat w/parchment interior
http://photobucket.com/69chevelleconvertible
TC#3512
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