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Old 08-28-2012, 04:28 PM
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86 chevy caprice classic electrical help

hey im new to this site, but i need some help. i was wondering if anyone knew if there was a ground to the fuse box of an 86 caprice, and where is it located. i looked by the fuse box but everything is taped up so i dont know what color it is. i know most grounds are black, but theres so many wires. anything would be appreciated, wiring diagrams, pictures and any suggestions. thanks in advance.
ray

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Old 08-28-2012, 06:54 PM
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just look for the bigest black wire from the fuse box,,
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Old 08-28-2012, 06:57 PM
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I was thinking that but they are all taped together so tight. Guess I could give it a try. Thanks
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Old 08-28-2012, 08:37 PM
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Moving this to Electrical.

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Old 08-29-2012, 04:37 AM
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There are no grounds in the fuse box, only power. The whole body is ground.
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Old 08-29-2012, 06:16 AM
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Well is there a way to cut off all electrical?
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Old 08-29-2012, 09:56 AM
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is there a ground that runs all electrical that i can run a switch to through the dashboard?
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Old 08-29-2012, 04:15 PM
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Not sure what you are wanting to do...... Do you want to kill the entire electrical system with one switch? Or are you trying to add a system etc....
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Old 08-29-2012, 05:34 PM
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Yes imbtrying to kill the whole electrical system with one switch. I have a drain and gonna be putting a new engine in over the winter, so while the engines out I can run a couple switches.
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Old 08-29-2012, 07:36 PM
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The absolute cheapest and easiest is to buy a battery cut off switch from AutoZone or Harbour Frieght for about 15 bucks....... remove your pos cable from the battery and hook it the switch, then from the switch to the battery.
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Old 08-29-2012, 08:10 PM
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Does that allow me to run the switch through the dashboard?
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Old 08-29-2012, 08:29 PM
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basics are simple

A common point of confusion comes from the word "ground" as it applies to automotive electrical systems.
Actually vehicles are completely isolated from "ground" or grounding as the term is applied to building and utility electrical systems. An exception to this would be electric cars during charging. Or electified railroads.
Grounding in a vehicle is simply all metal parts are connected together to form a common point of connection that is used to complete a circuit to the battery negative terminal.

vicrod
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Old 08-29-2012, 08:41 PM
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mount them anywhere

The battery disconnect switches are available in 2-3 different types. Twist ON-OFF, PUSH/PULL ON-OFF, etc. Look on the back of most if not all 1/4 mile race cars. Somewhere in the bumper or trunk lid area you'll find this type of switch.
Its simple to hook up. Simply take your GRD. -or- POS. cable and run it threw the switch. Switch in the ON position and the power -or- ground goes threw. Switch in the OFF position and the whole car is dead. Keep in mind that anything with a memory like a clock, radio stations will be wiped out everytime you turn the switch off. Also consider that battery cables are thick and in close quarters hard to bend. I wouldn't be mounting it in a thin plastic dash if it were me. If you hook a amp/volt meter between the POS. battery cable and the battery itself you'll get a reading if there is a draw. You can actually do the same with a test light. If you pull one fuse at a time the draw should disappear once you pull the fuse that controls the circut the draw is on. Just keep in mind that anything with a memory will create a small draw. You can see the difference on your metter by opening and closing the door or simply turning on your headlights. If you were to pull all the fuses and see no 'significant' draw disappear, remove the 12v wire from the alt. and see if it goes away. I have seen defective rectifiers in alts. draw amps. Bad hood & trunk mercury switchs keeping the light on, even glove box lights. Somethoing else to think of. 'IF' your battery is in good to excellent condition the faster it goes dead the bigger the draw is. Just curious have you had your battery completely charged and then imediately had it load tested ? Lots of folks assume they have some some of voltage/amperage draw when they have a bad battery. Hope this helps !
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Old 08-30-2012, 03:54 AM
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Yes you could get longer battery cables and run them into the dash area......I don't recommend this but it will work. The switch has a large red "L" key that is removable. You could mount the switch just under the lower dash, it would be hidden and work just as good.
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Old 08-30-2012, 06:10 AM
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You could use a continuous duty solenoid mounted in the main battery cable to cut off power. These are more expensive than standard starter solenoids, since they must stay connected for long periods, and some of them are designed to be latching so that once switched they do not require power to stay that way.

There was a thread in the last couple of months about a latching continuous-duty solenoid (no power required once its switched), and parts numbers were provided. I'd just page through the electrical forum postings, since there are not that many of them.

Bruce
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