Issues with fuel pump kill switch - Third Generation F-Body Message Boards


Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

Issues with fuel pump kill switch

Reply
 
Thread Tools Search this Thread
Old 08-12-2017, 01:24 AM   #1
Junior Member
Thread Starter
 
Wickydooda's Avatar
 
Join Date: Oct 2016
Location: California
Posts: 50
Issues with fuel pump kill switch

So I installed a killswitch for the ground (black) wire coming from the connector mounted behind the rear seat, and it was some cheap Dorman rocker switch with a light. It doesn't seem to be working. Here's what I did:

Cut the black wire (that is part of the pink, tan/white, black wiring harness), extend out both sides of the black wire to the switch, and plugged one wire into one side of the switch, and the other wire into the other side of the switch. For clearance reasons in my tight little hiding spot, I pulled out the metal terminal that you would plug into for the little LED light on the switch.
AFAIK, this switch should engage and disengage the ground connection to the fuel pump, thus killing fuel... however this switch seems to have no effect on the fuel pump because the fuel pump still primes and runs no matter what position the switch is in...

My questiona are: Did I wire it wrong? Is this switch just a POS and the ground wire is grounding through the switch anyway? Did removing the metal terminal responsible for the little LED mess up the internals of the switch somehow
Wickydooda is offline   Reply With Quote
Old 08-12-2017, 09:32 AM   #2
Supreme Member
iTrader: (1)
 
OrangeBird's Avatar
 
Join Date: Feb 2012
Posts: 1,580
Re: Issues with fuel pump kill switch

Quote:
Originally Posted by Wickydooda View Post
So I installed a killswitch for the ground (black) wire coming from the connector mounted behind the rear seat, and it was some cheap Dorman rocker switch with a light. It doesn't seem to be working. Here's what I did:

Cut the black wire (that is part of the pink, tan/white, black wiring harness), extend out both sides of the black wire to the switch, and plugged one wire into one side of the switch, and the other wire into the other side of the switch. For clearance reasons in my tight little hiding spot, I pulled out the metal terminal that you would plug into for the little LED light on the switch.
AFAIK, this switch should engage and disengage the ground connection to the fuel pump, thus killing fuel... however this switch seems to have no effect on the fuel pump because the fuel pump still primes and runs no matter what position the switch is in...

My questiona are: Did I wire it wrong? Is this switch just a POS and the ground wire is grounding through the switch anyway? Did removing the metal terminal responsible for the little LED mess up the internals of the switch somehow
Mistake #1 = you should not have used the negative side , you need to switch the positive wire going to the fuel pump

Mistake #2 = you should have tapped into that positive wire at or near the fuel pump relay under the hood and left the harness in the back uncut .

Mistake #3 = the pump draws a sizable amount of power , any autoparts store cheap plastic switch is just another potential failure point , an electronics supply store can hook you up with a worthy switch .

And lastly , I don't like the idea of any kinds of extra failure point in the form of add on kill switches and such , are things really that bad where you live that a kill switch is needed VS a good alarm system ?
OrangeBird is offline   Reply With Quote
Old 08-12-2017, 12:27 PM   #3
Supreme Member
iTrader: (12)
 
Tibo's Avatar
 
Join Date: Jun 2003
Location: Desert
Posts: 3,837
Re: Issues with fuel pump kill switch

I agree with OrangeBird. There are plenty of alternative solutions for vehicle safety that don't involve adding in kill switches. Many solutions are actually in threads about someone installing or wanting to install a kill switch. However, if you must have this switch then do as Orange recommended with one alteration, Use the relay's energizing wire since it will be a very low amperage wire and you can use an inexpensive switch. Most electronics are ground switching for controlling relays so it is OK to use a ground in that situation.

In most cases, an alarm with the positive wired straight to the battery and a "club" steering wheel lock will ward of most car thieves. Pulling fuses can also work and you could purchase a piggyback fuse holder that you could wire a switch to. Unfortunately if their is a a group of car theft guys they will be able to steal your almost no mater what you do. So as Orange alluded to, if things are that bad where you live you need to get out of the area or buy some other car that they would have no interest in stealing. 80-90's S-10s, Cavaliers and the little Toyota pickups are reliable, easy to work on and guaranteed to be passed up by thieves. I would love if I could still find mid-mileage s-10s with a 4 cylinder and working air conditioning.
Tibo is offline   Reply With Quote
Old 08-12-2017, 07:40 PM   #4
Supreme Member
iTrader: (12)
 
QwkTrip's Avatar
 
Join Date: Mar 2001
Location: Illinois, USA
Posts: 4,109
Re: Issues with fuel pump kill switch

Is that black wire really fuel pump ground or is it just the fuel sender return to dash gage?
QwkTrip is offline   Reply With Quote
Old 08-12-2017, 07:52 PM   #5
Supreme Member
iTrader: (12)
 
Tibo's Avatar
 
Join Date: Jun 2003
Location: Desert
Posts: 3,837
Re: Issues with fuel pump kill switch

Quote:
Originally Posted by QwkTrip View Post
Is that black wire really fuel pump ground or is it just the fuel sender return to dash gage?
The way I read the wiring diagrams it appear as if the fuel gauge and fuel pump share the same ground wire.
Tibo is offline   Reply With Quote
Old 08-13-2017, 02:42 AM   #6
Junior Member
Thread Starter
 
Wickydooda's Avatar
 
Join Date: Oct 2016
Location: California
Posts: 50
Re: Issues with fuel pump kill switch

Quote:
Originally Posted by Tibo View Post
The way I read the wiring diagrams it appear as if the fuel gauge and fuel pump share the same ground wire.
Correct. However think (one of) the mistake(s) I made was that although I interrupted the ground wire straight from the fuel pump, that is not to say that the fuel pump isn't just finding another route to ground itself... oops.

Thanks for all the tips THO. I have a club, and I am going to take y'alls advice and just interrupt the hot wire from the relay, even though that seems very easy for a theif to just bypass.

Call me paranoid, but I just really don't want my car stolen
Wickydooda is offline   Reply With Quote
Old 08-14-2017, 05:17 PM   #7
Supreme Member
 
NINÅ's Avatar
 
Join Date: Jan 2006
Location: Mooresville NC
Posts: 3,172
Deft Theft

The odds of a street loser diagnosing, then running a jumper wire to bypass your hidden switch is near zero if not zero.

I take it VATS is not installed or inoperative.

Sometimes making your car theft proof is more of an engineering exercise than a necessity.

So after you install the kill switch:

Tow trucks can be defeated.

When parking, back it in so they have to drag locked wheels.

Install a tilt switch so if the car is lifted, a siren plus smoke release canisters are set off.

You can use hidden batteries so even if the moron cuts the battery cable the other batterie(s) will take over.

You can have it turn on a GPS tracker.

For non-towing situations
(the vast majority) you can install:

A fogger.

Sheet metal in the door making it impossible to use a slim-jim.

A glass break alarm/ignition disabler.

A keypad lockout of the ignition.

Switches which have to be touched in a certain order so even if they’re not hidden the loser won’t know the correct order.

A timer that makes the loser think he is getting away by allowing the car to start but it stalls after several seconds and only you know the secret to defeat it.

The above is just a small portion of the many ways to render thieves helpless and running away like the losers they are.

No one from the Impossible Missions Force is going to try to steal anyone’s car.

It’s all about keeping the street trash in line, and occasionally horizontal.


Happy Racing !



Some Drivers Use Only One Foot To Drive ▬ You Can Identify Them ▬ They Are The Ones Always Crashing Thru Storefronts Or Plummeting Off Parking Garages

NINÅ is offline   Reply With Quote
Old 08-14-2017, 08:28 PM   #8
Supreme Member
 
NoEmissions84TA's Avatar
 
Join Date: Feb 2017
Location: Meriden, CT 06450
Posts: 1,046
Re: Issues with fuel pump kill switch

A timer that makes the loser think he is getting away by allowing the car to start but it stalls after several seconds and only you know the secret to defeat it.

I like this option the best.
NoEmissions84TA is offline   Reply With Quote
Old 08-14-2017, 09:08 PM   #9
Junior Member
Thread Starter
 
Wickydooda's Avatar
 
Join Date: Oct 2016
Location: California
Posts: 50
Re: Deft Theft

Quote:
Originally Posted by NINÅ View Post
The odds of a street loser diagnosing, then running a jumper wire to bypass your hidden switch is near zero if not zero.

I take it VATS is not installed or inoperative.

Sometimes making your car theft proof is more of an engineering exercise than a necessity.

So after you install the kill switch:

Tow trucks can be defeated.

When parking, back it in so they have to drag locked wheels.

Install a tilt switch so if the car is lifted, a siren plus smoke release canisters are set off.

You can use hidden batteries so even if the moron cuts the battery cable the other batterie(s) will take over.

You can have it turn on a GPS tracker.

For non-towing situations
(the vast majority) you can install:

A fogger.

Sheet metal in the door making it impossible to use a slim-jim.

A glass break alarm/ignition disabler.

A keypad lockout of the ignition.

Switches which have to be touched in a certain order so even if they’re not hidden the loser won’t know the correct order.

A timer that makes the loser think he is getting away by allowing the car to start but it stalls after several seconds and only you know the secret to defeat it.

The above is just a small portion of the many ways to render thieves helpless and running away like the losers they are.

No one from the Impossible Missions Force is going to try to steal anyone’s car.

It’s all about keeping the street trash in line, and occasionally horizontal.



Happy Racing !



Some Drivers Use Only One Foot To Drive ▬ You Can Identify Them ▬ They Are The Ones Always Crashing Thru Storefronts Or Plummeting Off Parking Garages
I love everything about this post. Thanks!!
Wickydooda is offline   Reply With Quote
Reply


Go Back   Third Generation F-Body Message Boards >

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Advertising
Featured Sponsors
Vendor Directory

1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 03:56 AM.


All content copyright © 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: