Question about 2000 Chevrolet Blazer

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I pulled the brake light switch, a wire came out the plug end. i need tofind where it goes

Brake light switch plug end wire diagram

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Posted on Jan 02, 2017

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SOURCE: wiring diagram

Helpful Wiring Information when hard wiring your brake control:
Run two wires to the battery:
White - Ground
Black - Power
Blue - Run to Electric Brakes at the Rear Plug
Red - Run to cold side of brake switch off of the brake pedal (using a test light to find the cold side)
Note: Always wire the red wire to the heaviest gauge wire when testing cold side of brake switch.

You can view more info here.

Posted on Nov 17, 2008

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SOURCE: Wiring harness diagram

Your question is not clear, 2002 trailblazer has a towing harness, in order to find each wire, use a ohmmeter and try out each application.

In case of male harness of a camper you can test it with 12 volts in each wire looking which light is on and if it is different position cut wires and make similar wiring

Posted on Nov 19, 2008

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SOURCE: 1995s-10 turn lights and brake lights dont work.

if u have a trailor hitch plug i would start there sounds like u have a short most common problem

Posted on Feb 07, 2009

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SOURCE: brake wiring diagram chevy lumina

why not just replace the turn signal switch must faster and safer . buy one from your local parts house then you can see its not that easy to install but you can do it with a little help

Posted on Aug 26, 2009

  • 1985 Answers

SOURCE: need a wiring diagram for a chevy s10. brake

your power starts at the brake light fuse,check with a test light,then proceed to stop light switch on brake pedal under dash,one wire will be hot when when you check it with your test light, the other won't be until you press down the brake pedal then the power flows through to the second wire,if no power to second wire replace switch,if you have power remove tail light bulbs and check for power in side socket.

Posted on Nov 26, 2009

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No power to left rear turn/ brake light

Check the display. Ask a helper to step on the brake pedal while you check the lights from the rear. If no lights appear, check the fuse that connects the brake lights. The owners manual will show the location of the fuse box and which fuse is for the brake lights. Pull out the fuse and look at the wire in the central window. If the wire is broken, replace the fuse. Make sure the new fuse is not blown, and carries the same amperage.
Take note of lights that are out, if any are working. The problem may be cured by replacing the bulb in a brake light that's out. A burned out bulb has a broken filament and a dark brown spot on one side. Check the owners manual for bulb type.
Check the circuit if replacement bulbs and fuses do not restore the lights. Find the wiring diagram in the vehicle assembly manual. The circuit for the brake lights runs from the battery to the fuse, to the pedal switch, to a connection plug, to the lights. The circuit has to be checked with a volt tester at all points.
Check the battery power and the light on your volt tester. Turn the ignition key far enough to activate the electrical systems. Turn on the lights to check for battery power. If the battery has power, ues it to check the volt tester. Put the black lead (the ground) from the volt tester on the negative battery terminal. Briefly touch the red tester light on the positive terminal. The light on the volt tester should flash brightly.
Test the wiring to the fuse. Clip the ground wire to solid metal near the fuse. Touch the light tip to both sides of the fuse. Both should light the tester. If neither side lights, the wire between the battery and fuse is bad. If only one side lights, the fuse is blown.
Test the switch and wiring. Touch the light tip of the tester to both terminals on the brake pedal switch without putting any pressure on the pedal. One should carry power and the other should not. When both show power, the switch is stuck and the brake lights are always on. If neither shows power, the wiring between the fuse and the switch is bad. Now check both switch terminals while the pedal is depressed. Both sides should light the tester. If not, the switch is bad.
Check the connection plug. Unplug the connection and refer to the vehicle manual to identify the brake light wire. Touch the tester light on the brake light wire at the inner socket on the battery side. If the tester lights, the power is flowing to this point. If not, the wire between the plug and the pedal switch is bad.
Check the socket. Plug in the connector plug and remove the bulb. Touch the contact inside the socket. If the tester lights, the socket is good. The socket and wire running to the plug should be replaced if the tester doesn't light.
Check the bulb with the ground wire. The bulb must be in its socket. The ground wire running to the socket should be black or brown. Stab the tester through the insulation. If the tester lights, the bulb is good. Replace the bulb if it doesn't light.
Check the ground wire. Remove some of the insulation around the ground wire. Twist one end of the extra wire around the exposed ground wire. Touch the other end to a solid piece of metal. If the brake light comes on, the ground wire is bad.
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Oct 13, 2014 | 2000 Ford Expedition

1 Answer


There is an electrical brake light switch under the dash, at the top of the brake pedal, near the steering column. This brake light switch is wired in series with the gear shift lever, which means if one goes bad or has a problem, the other does too. If the brake light switch isn't working correctly, it will not allow the gear shift lever to be moved from the Park position. You first have to remove the plastic cover under the dash that covers the steering column (it will pop loose when pulled on and some are tougher than others to pull off but go back easily) to get to where you can see the brake light switch and the plug-in that plugs into it. Next move the seat all the way back to give you more room, and tilt the steering wheel all the way up out of the way. That switch could be bad or the two wires going to the plug-in could not be making good electrical contact. I had this to happen to my 1997 Mercury Grand Marquis and seen it happen to several others that I fixed. To test if it's the brake light switch, unplug the plug-in that has 2 wires going into it that is plugged into to the brake light switch (you will need a flash light, a flathead screw driver, and a pair of pliers to make this job easier). Take a 3 or 4 inch length of heavy solid wire, remove a small amount of the insulation from both ends of the 3 to 4 inch solid wire and bend it into a "U" shape to make a jumper wire out of it. Plug one uninsulated end of the "U" solid wire into one side of the plug-in with the 2 wires running to it that connects to the brake light switch on the brake pedal, then plug the other uninsulated end of the "U" shaped wire into the other opening of that same plug-in that has the 2 wire running into it. Your brake lights should come on and stay on, even though you are not touching the brake pedal, nor is your key in the on position, and your gear shift lever should move to any gear you want when you turn your key to the on position. Be advised, your brake lights will stay on as long as the jumper wire is stuck into the plug-in and will run your battery down if left that way. If what I have just explained happens, you have a faulty brake switch. If it does not happen, one of the wires going to the brake light switch plug-in may not be making a good connection or it may be grounded. To see if it's grounded check all of your fuses. Check the fuses under the dash and the fuses mounted on the fender under the hood. If you find a blown fuse, replace it. If it blows the fuse again, you have a ground and you will have to trace down where the wire is grounded and fix it. A volt meter set for 12 volts will aid in this when tracing a wire that is grounded. Then re-try all of this again after you have found any place the wire may have been grounded and you have fixed it. Most likely it's 1 of the 2 wires not making a good connection in the plug-in that plugs into the brake pedal switch. This seems to be a fault with the 1997 Mercury Grand Marquis. I've fixed this problem on 4 different Mercury's in the past. I don't know if this happens to other models of Mercury Grand Marquis or the Ford Crown Vic's. Hope this helps. Good luck.

Oct 02, 2011 | 1997 Mercury Grand Marquis

1 Answer

All brake lights out fuse is good and bulbs are good thinks its a ground but don't know where to look. found two wires in back of left rear light. one wire connected to body of truck goes nowhere else just...


Mar 30, 2010 | 2006 Toyota Tacoma

1 Answer

I need to wire an electric brake controller in my truck

you can either wire it straight or gm makes a connector that plugs into the drivers side floor . theres a box down there that has a cover over it and the gm connector plugs straight to it. but be careful because i have seen several times were gm wired it wrong the stop light plug is in the wrong spot.take a test light to ground touch each connector while pressing and releasing brake pedal the one that lights the light, is your stop light look on there connector and check to see if that plug is going to the red wire if not move the red wire to that spot. as for wiring it you have to do it this way. black wire goes to constent hot, white wire goes to constent ground , blue wire goes back to your trailer plug for your electric brake, and red wire as you know by now goes to the stop light.

Dec 27, 2009 | 2004 Chevrolet Silverado

2 Answers

Need a wiring diagram for a chevy s10. brake

your power starts at the brake light fuse,check with a test light,then proceed to stop light switch on brake pedal under dash,one wire will be hot when when you check it with your test light, the other won't be until you press down the brake pedal then the power flows through to the second wire,if no power to second wire replace switch,if you have power remove tail light bulbs and check for power in side socket.

Nov 24, 2009 | 1997 Chevrolet S-10 Pickup

2 Answers

Brake light came on, on my dash.ihave brake fluid

could be a faulty brake fluid level switch ,or parking brake switch, both of the switches supply grond for the light so unplug one at a time to see if light goes out. the brake fliud one is plugged into the master cylinder reservoir the parking brake switch is on top of the p.b. pedal assembly one more option is the brake safety switch, the block under the master with one wire sticking out of it same test pull the wire to see if light goes out

Jun 30, 2009 | 1996 Mercury Grand Marquis

1 Answer

I am adding trailer lights to my 1998 nissan frontier

You may be better off checking at dealer, or autoparts store for an adapter harness that goes inline. They simply plug into the harness ahead of all your tailights etc, and make it easier. At most, you may end up having to run a separate wire for brake control.

Mar 13, 2009 | 1998 Nissan Frontier

1 Answer

1995s-10 turn lights and brake lights dont work.

if u have a trailor hitch plug i would start there sounds like u have a short most common problem

Feb 07, 2009 | 1995 Chevrolet Astro

1 Answer

I need a schematic for 1999 Ford Escort Se rear brake lines

start with easy thing first are you sure both bulbs are ok ? get a test lamp
or make one!
get a good 12v bulb attach wires to side of bulb one to the terminal on base of
bulb,tape together now you can fined volts
hand brake on out of gear?

turn key on go inside car above the brake

theres a switch pull the plug off
put one end your test lamp to earth (the car body) and the other wire put to the terminals on the plug you pulled off if you get your test bulb to light its the switch thats faulty

replace switch if you have power at the switch and still no lights make a short bit of wire take back the insulation a bit so bair wire is showing make it in to a u shaped and put in to plug above the
brake that you pulled off you should now have volts(power) in the boot useing your new test lamp
to fned it make good all earthing points its somewhere between the switch and the boot?
if you fine when brake is pressed you get more than one light on its a bad earth
if you have no power at the switch ts prob fuse box fault tthry wll known for bad solder joins
good luck ps dont foget to replace plug

Jan 20, 2009 | 1999 Ford Escort

1 Answer

Brake light wiring diagram 1972 Gremlin

I have a 72 amx, the two wire conector at the brake light switch down on the brake pedal is light green and pink and the plastic connector is brown and plugs into the switch at the top of the brake pedal.

May 21, 2008 | 1983 AMC American Motors Concord

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