Cut off switch

Coleydog · 04-04-2023, 01:00 PM

How do you stock guys do the cutoff switch when battery is still in the front (normal place)?

FireSale · 04-04-2023, 01:37 PM

I don't use it, but Painless makes a remote cuttoff. It's a continuous duty solenoid installed at the battery terminal that is tripped by a 12 volt signal from a remote mounted switch. The wire for the trigger is only 14 gauge so running it to the back is no big deal. I have a trunk battery and mechanical switch but put a 250 amp continuous duty golf cart solenoid where the main power reaches the ignition box. I can kill everything from my seat but I can't turn it back on if it's killed by tech or safety from outside. The Painless is around $100 and my home brew was about $50.

Coleydog · 04-04-2023, 03:35 PM

Quote:

Originally Posted by FireSale

I don't use it, but Painless makes a remote cuttoff. It's a continuous duty solenoid installed at the battery terminal that is tripped by a 12 volt signal from a remote mounted switch. The wire for the trigger is only 14 gauge so running it to the back is no big deal. I have a trunk battery and mechanical switch but put a 250 amp continuous duty golf cart solenoid where the main power reaches the ignition box. I can kill everything from my seat but I can't turn it back on if it's killed by tech or safety from outside. The Painless is around $100 and my home brew was about $50.

Any layout on that? I like it

Kirk Morgan · 04-04-2023, 06:53 PM

It is wired like a ford starter solenoid. The continuous duty solenoid can be triggered with positive or negative switching. There are two small studs and i usually hook a jumper from on stud to constant power and the other stud to switched negative. Hope this helps.

Larry Hill · 04-04-2023, 07:14 PM

On the Cuda I have a disconnect switch on the negative side of the battery next to me just in case.

Tom Goldman · 04-04-2023, 08:54 PM

Heres a shot of the disconnect switch I installed on Ron Muffetts gen 3 Camaro Stocker .
I modified a Lokar cable operated switch to work under the hood rather than in the rear as the car utilizes just the one battery . the control handle is inside next to the shifter.
Solenoid operated relays are a good idea for killing a alternator but involve maintaining power to the control switch. I would avoid using them in favor of a mechanical switch.

Coleydog · 04-05-2023, 12:43 AM

All good ideas but I was thinking of how track personnel would turn it off in an emergency, in back it’s easy but not wanting to run big cables to front. I’ve been thing about the solenoid thing too but didn’t want it egauged while in use.

curtis reed · 04-05-2023, 08:21 AM

Not a class car but I am using a high amp relay and E-stop buttons on my steering wheel and on the back of my car.

Rear button

Relay

Kirk Morgan · 04-05-2023, 09:09 AM

Just use a on-off switch with a negative or positive wire hooked to the solenoid. It can be a 14 gauge wire, The wire connects to the small studs on the solenoid. Hope this helps.

curtis reed · 04-05-2023, 09:31 AM

I wouldn't cut the negative side. If you have a wreck and the wire gets cut and goes to ground the relay won't shut off.

04-04-2023, 01:00 PM	#1
Coleydog Senior Member Join Date: Jul 2014 Posts: 569 Likes: 36 Liked 53 Times in 38 Posts	Cut off switch How do you stock guys do the cutoff switch when battery is still in the front (normal place)?

04-04-2023, 01:37 PM	#2
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 126 Posts	Re: Cut off switch I don't use it, but Painless makes a remote cuttoff. It's a continuous duty solenoid installed at the battery terminal that is tripped by a 12 volt signal from a remote mounted switch. The wire for the trigger is only 14 gauge so running it to the back is no big deal. I have a trunk battery and mechanical switch but put a 250 amp continuous duty golf cart solenoid where the main power reaches the ignition box. I can kill everything from my seat but I can't turn it back on if it's killed by tech or safety from outside. The Painless is around $100 and my home brew was about $50. __________________ Dale Shearon 68 Mustang 6394

04-04-2023, 06:53 PM	#4
Kirk Morgan Member Join Date: Jan 2009 Posts: 226 Likes: 1 Liked 78 Times in 42 Posts	Re: Cut off switch It is wired like a ford starter solenoid. The continuous duty solenoid can be triggered with positive or negative switching. There are two small studs and i usually hook a jumper from on stud to constant power and the other stud to switched negative. Hope this helps.

04-04-2023, 07:14 PM	#5
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,614 Likes: 1,901 Liked 10,655 Times in 2,211 Posts	Re: Cut off switch On the Cuda I have a disconnect switch on the negative side of the battery next to me just in case. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

04-04-2023, 08:54 PM	#6
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,473 Likes: 881 Liked 858 Times in 234 Posts	Re: Cut off switch Heres a shot of the disconnect switch I installed on Ron Muffetts gen 3 Camaro Stocker . I modified a Lokar cable operated switch to work under the hood rather than in the rear as the car utilizes just the one battery . the control handle is inside next to the shifter. Solenoid operated relays are a good idea for killing a alternator but involve maintaining power to the control switch. I would avoid using them in favor of a mechanical switch. Attached Thumbnails __________________ Tom Goldman 1500 SG , 1506 STK

04-05-2023, 12:43 AM	#7
Coleydog Senior Member Join Date: Jul 2014 Posts: 569 Likes: 36 Liked 53 Times in 38 Posts	Re: Cut off switch All good ideas but I was thinking of how track personnel would turn it off in an emergency, in back it’s easy but not wanting to run big cables to front. I’ve been thing about the solenoid thing too but didn’t want it egauged while in use.

04-05-2023, 08:21 AM	#8
curtis reed Member Join Date: Jul 2011 Location: Kiefer, Ok. Posts: 167 Likes: 62 Liked 125 Times in 59 Posts	Re: Cut off switch Not a class car but I am using a high amp relay and E-stop buttons on my steering wheel and on the back of my car. Rear button Relay

04-05-2023, 09:09 AM	#9
Kirk Morgan Member Join Date: Jan 2009 Posts: 226 Likes: 1 Liked 78 Times in 42 Posts	Re: Cut off switch Just use a on-off switch with a negative or positive wire hooked to the solenoid. It can be a 14 gauge wire, The wire connects to the small studs on the solenoid. Hope this helps.

04-05-2023, 09:31 AM	#10
curtis reed Member Join Date: Jul 2011 Location: Kiefer, Ok. Posts: 167 Likes: 62 Liked 125 Times in 59 Posts	Re: Cut off switch I wouldn't cut the negative side. If you have a wreck and the wire gets cut and goes to ground the relay won't shut off.