Separate back up button?

Bill Baer · 01-09-2017, 01:21 AM

Does anyone use a separate back up button to put their PG solenoid in to engage reverse without engaging the delay box/throttle stop or starting line control cylinder?
I'm thinking I could wire one in the circuit with a diode preventing feedback to the delay box but I don't have any knowledge concerning diode sizing or ratings etc.
Can one of you Guys help me out with this?

voltdr · 01-09-2017, 12:09 PM

You don't need a diode. The 12V when put to the transbrake is on the output terminal of the delay box and does not cause any issues in the delay box.
Dan

63corvette · 01-09-2017, 05:03 PM

The Don Davis race car wiring diagram is setup that way for wiring the Davis cars.
I wired my own and did not use the separate button/switch because I thought it might accidently get tripped while moving to the staging lanes in low gear causing a real issue.
The wiring diagram showed a simple on/off switch and I have looked at a few Davis cars which had the switch mounted on the dash panel.
I just chose not to use one.
Just My 2 Cents
Rick Cates
Canyon, TX

voltdr · 01-09-2017, 05:26 PM

I've used them in the past. I just used a toggle switch mounted on the dash, that way there wasn't a chance of accidentally hitting it while driving around, and I didn't have to hold the button down while turning the wheel.
Dan

Lenny5160 · 01-09-2017, 05:58 PM

One side of button to +12 volts, the other side of the button to the Transbrake terminal of the delay box. That's it; no problems.

Jeff Stout · 01-09-2017, 06:32 PM

Could you use a momentary switch. You would have to steer with 1 hand and hold switch to go in reverse. That way you will never forget to flip toggle switch.

Bill Baer · 01-13-2017, 11:18 PM

Your right! I would be putting power to the output side of an open relay.
Duh

Thanks Voltdr.

Thanks for the advice guys.
I think I'll just use a momentary toggle switch on the dash.

01-09-2017, 01:21 AM	#1
Bill Baer Senior Member Join Date: Jul 2007 Location: Nothern IL Posts: 596 Likes: 1 Liked 1 Time in 1 Post	Separate back up button? Does anyone use a separate back up button to put their PG solenoid in to engage reverse without engaging the delay box/throttle stop or starting line control cylinder? I'm thinking I could wire one in the circuit with a diode preventing feedback to the delay box but I don't have any knowledge concerning diode sizing or ratings etc. Can one of you Guys help me out with this? __________________ Bill Baer 3391 SC, 339B SC, QR

01-09-2017, 12:09 PM	#2
voltdr Senior Member Join Date: Jan 2008 Location: Texas Posts: 706 Likes: 77 Liked 100 Times in 51 Posts	Re: Separate back up button? You don't need a diode. The 12V when put to the transbrake is on the output terminal of the delay box and does not cause any issues in the delay box. Dan

01-09-2017, 05:03 PM	#3
63corvette Senior Member Join Date: Mar 2007 Location: Canyon, Tx Posts: 552 Likes: 128 Liked 359 Times in 103 Posts	Re: Separate back up button? The Don Davis race car wiring diagram is setup that way for wiring the Davis cars. I wired my own and did not use the separate button/switch because I thought it might accidently get tripped while moving to the staging lanes in low gear causing a real issue. The wiring diagram showed a simple on/off switch and I have looked at a few Davis cars which had the switch mounted on the dash panel. I just chose not to use one. Just My 2 Cents Rick Cates Canyon, TX

01-09-2017, 05:26 PM	#4
voltdr Senior Member Join Date: Jan 2008 Location: Texas Posts: 706 Likes: 77 Liked 100 Times in 51 Posts	Re: Separate back up button? I've used them in the past. I just used a toggle switch mounted on the dash, that way there wasn't a chance of accidentally hitting it while driving around, and I didn't have to hold the button down while turning the wheel. Dan

01-09-2017, 05:58 PM	#5
Lenny5160 Senior Member Join Date: Nov 2015 Location: Inver Grove Heights, MN Posts: 898 Likes: 604 Liked 431 Times in 224 Posts	Re: Separate back up button? One side of button to +12 volts, the other side of the button to the Transbrake terminal of the delay box. That's it; no problems. __________________ S/ST 51 S/C 53

01-09-2017, 06:32 PM	#6
Jeff Stout VIP Member Join Date: Dec 2001 Location: phoenix Posts: 1,486 Likes: 66 Liked 704 Times in 281 Posts	Re: Separate back up button? Could you use a momentary switch. You would have to steer with 1 hand and hold switch to go in reverse. That way you will never forget to flip toggle switch.

01-13-2017, 11:18 PM	#7
Bill Baer Senior Member Join Date: Jul 2007 Location: Nothern IL Posts: 596 Likes: 1 Liked 1 Time in 1 Post	Re: Separate back up button? Your right! I would be putting power to the output side of an open relay. Duh Thanks Voltdr. Thanks for the advice guys. I think I'll just use a momentary toggle switch on the dash. __________________ Bill Baer 3391 SC, 339B SC, QR Last edited by Bill Baer; 01-13-2017 at 11:25 PM.