Converter Lock up Relay wiring help - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 5 (permalink) Old May 4th, 14, 12:37 AM Thread Starter
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Emilio
 
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Converter Lock up Relay wiring help

So, I have installed my 2004r transmission and I planned on keeping the lock up on a switch, but the whole on/off and simply forgetting it is getting old and I started looking for a lockup kit but they all require to drop the pan and change the pressure switch to the two prong. Why is that?
What are the advantages of having a vacuum switch?
Right now I have it mocked up and it works but it seems too easy.
Is there anything I am forgetting that may cause the relay set up to fail?

I am using the 5 prong relays and power is switched (the drawing was just to give you an idea).
Should I be concerned of back feed (do I need diodes on the solenoid side?)
The Solenoid has continuity at rest I do not know if that is normal.



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post #2 of 5 (permalink) Old May 4th, 14, 2:20 AM
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Derrick
 
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Re: Converter Lock up Relay wiring help

That looks way too complicated.. you don't need any relays. GM didn't use them and you don't need to, either.

Run the power (+) wire from the fuse box thru the brake light switch to the solenoid.. ground the relay thru a normally open pressure switch on the 4th gear hydraulic circuit.

This locks up the solenoid when it shifts into 4th by grounding it and unlocks it when you hit the brakes by cutting off the + power supply.. you can put a vacuum switch inline betwee the fusebox and brake light switch to unlock in 4th gear when engine vacuum drops to prevent lugging when climbing a hill or something..

You might need to get a brakelight switch from an 80's car to make it work- I used one that I think was from a Caprice when I put a 700r4 in my 74 Monte Carlo and the brake light wires plugged right in..

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post #3 of 5 (permalink) Old May 4th, 14, 6:26 AM
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Brian
 
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Re: Converter Lock up Relay wiring help

I ran a hot to push/pull switch then to relay, ground to relay, brake switch to relay, and prong A (I believe) from trans to relay. Works perfectly!

I might be wrong on some of this, it has been 2 years since the install. I would have to go check it out to be sure. I did a Google search and found this set up on other car forums.

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post #4 of 5 (permalink) Old May 4th, 14, 3:50 PM Thread Starter
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Emilio
 
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Re: Converter Lock up Relay wiring help

Nova, I get what you mean but it is simpler when you look at it because I already have all the wires routed into the cab I also already have the newer brake switch because I needed it for my remote start.

If I add a vacuum switch the wiring would go:

(+)>Fuse(5A)>Vacuum switch>brake switch>toggle switch>relay>TCC Solenoid
(-) is constant
I am using as signal for the forth gear a NC pressure switch.

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post #5 of 5 (permalink) Old May 5th, 14, 7:43 PM
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Joe
 
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Re: Converter Lock up Relay wiring help

Emilio,

If you still need some help, send me a PM.

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