Rear lights! (Also, how not to short out your whole truck)

Nashvegas34

New member
Thanks to 004Gunner for his writeup, as I followed it nearly exactly except for a few minor changes.
http://www.toyota-4runner.org/3rd-gen-t4rs/66574-installed-rear-lights.html

The fog lights I recently installed also came with a set of simple 2"x5" 55w halogen driving lights. I've long wanted a pair of rear-facing lights to augment the stock reverse bulbs, light up the area when in the sticks, and, when necessary, ward off tailgaters and drivers who don't understand their high beam/low beam switch (although this last part is technically illegal...). I attached them to the rear bumper, using two holes already present and drilling two more.

Like 004Gunner, I purchased this 3-position (on/off/on) switch for the dash:
Scion OEM Style Rocker Switch
And I did my wiring following his diagram, mounting a relay behind the driver's kick panel and running the wires under/behind the driver's side paneling all the way to the back and to the outside, just using zip ties to keep it neat. This involved tapping the cigarette lighter power wire (gray wire) so I can trigger the lights manually when the key is in using accessory power, and tapping the reverse light wire (red wire w/ yellow stripe in 2000) behind the kick panel so the lights would come on when in reverse.

The only real difference that I could see is that instead of going through a grommet in the back to get the wires out of the cargo area and to the lights, I simply ran them out the vent behind the driver's cargo-area panel, which comes out right behind the mud flap. Also, for the wire from the battery to the relay, I already had a tiny hole in the firewall where the power wire for my alarm comes in, so I used that as my entry point.

Here are pics:

Before
today 6.JPG

After
photo31.JPG

Manually turned on
photo32.JPG

Shifted in reverse
photo33.JPG

As for the other part of this thread's subject, I managed to short out power to the whole truck because of how I connected to the battery. I installed the lights on Sunday, and on Monday I was playing with them by flipping them on and off without the truck running. On one of my flips, I heard a loud click and everything went dead, as in the entire truck - no lights, no door ding, no accessory power, nothing. Turning the key to start the truck resulted in nothing, not even a starter click. After a few minutes some power came back, but it immediately died again when I tried to engage anything electrical. Stumped, I jumped the battery and drove around for a few minutes, but there was clearly something wrong because everything electical seemed to be struggling. My dash lighting even flickered in sync with my blinker when signaling a turn and there was a weird whine from the engine. I got back home, and when I turned the key off, all power was lost again.

After retracing all of my wiring steps and feeling confident I had everything right, I disconnected the negative battery cable and then the lights' power wire from the positive terminal. When I reconnected the negative terminal, I immediately had full power again. So it was clear the problem was in the connection to the battery. After staring at it for a few minutes, I realized I had connected the power wire to the bolt on the positive cable marked in red in the pic below, when I should have connected to the bolt actually on the main positive cable. I'm not an electrical expert but, but I assume that the way I had it was creating a short, or an arc from the main cable over to my connection point, so that whenever I drew too much juice it would short out. I moved the lights' power wire over to the main screw, and so far have had no further problems.

Battery (I know it looks nasty, cleaning it is on my to-do list very soon)
photo34.JPG

I'm very happy with the lights. They really help me see better when backing up at night, and I like having the ability to trigger them manually whenever I want.
 

Attachments

  • photo31.JPG
    photo31.JPG
    58.8 KB · Views: 2,072
  • photo32.JPG
    photo32.JPG
    57.6 KB · Views: 2,226
  • photo33.JPG
    photo33.JPG
    60.3 KB · Views: 2,138
  • today 6.JPG
    today 6.JPG
    123.1 KB · Views: 2,023
  • photo34.JPG
    photo34.JPG
    103.2 KB · Views: 2,067
Last edited:
Register to hide this ad
Good job, I also had mine connected to reverse at first, but eventually just chose using the manual switch instead...I hate seeing my 510's turn on and off going thru gears and shortening the life of the bulbs...No biggie though coz I can always reconeect one wire to re-activate that mode.
 
first off iunno if this has to do with your choice of wire colors, but you "seem" to have both positive and negative on the positive terminal of your battery? considering you want to keep black as ground and red as positive..
why are both lines going to only the positive?

and to address your other question about the wire being on either terminal. there shouldnt be a difference whether its on the right bolt or the left..
you really want to get it checked out especially if the truck died that badly..

you might be having a short somewhere throughout the line.. or your battery is crap and the lights are pulling to much juice, or also cleaning your terminals will eliminate the problem where you have a bad connection and you are creating a large amount of resistance between the battery and the connectors itself which is not letting the alt charge the battery properly... ive seen this happen before and it "slowly" killed the battery and when it got low enough the alt wouldnt keep up with the charge due to the battery acid being in the way..

but yup other then that the lights look bright!
 
Definitely looks good man! I've got all the stuff needed to do this mod, just haven't found a place I liked to put the rectangular lights I have..... Your setup looks good though.... hummm ;)

I also think that your issue may be related to the positive terminal being so cruddy. But think that it's most likely your black wire (if it is the ground), causing the issue. I would simply bolt it to the inner fender or firewall.

Again, looks good! :guitar2:
 
Looks good. I've been thinking about this mod too. I take it the black wire everyone's referring to is the power wire for the lights you just hooked up, so it's misleading that it's a "ground" wire?

Cleaning terminals does wonders, and there's a spray that's reddish in color that helps prevent the terminals from corroding that I suggest you use after you take a wire brush and lemon juice or some sort of battery terminal cleaner to it.
 
first off iunno if this has to do with your choice of wire colors, but you "seem" to have both positive and negative on the positive terminal of your battery? considering you want to keep black as ground and red as positive..
why are both lines going to only the positive?

and to address your other question about the wire being on either terminal. there shouldnt be a difference whether its on the right bolt or the left..
you really want to get it checked out especially if the truck died that badly..

you might be having a short somewhere throughout the line.. or your battery is crap and the lights are pulling to much juice, or also cleaning your terminals will eliminate the problem where you have a bad connection and you are creating a large amount of resistance between the battery and the connectors itself which is not letting the alt charge the battery properly... ive seen this happen before and it "slowly" killed the battery and when it got low enough the alt wouldnt keep up with the charge due to the battery acid being in the way..

but yup other then that the lights look bright!

The black wire is power for the lights (from battery to relay). The other wire you're seeing (the red one) is actually to my aftermarket alarm that was installed when I bought the truck 11 years ago, so it's not a ground or negative wire, and it has been there since purchase. So ignore the actual colors of the wires there. The negative battery cable is properly grounded like it always has been. Like I said, I'm not an expert and would have thought that connecting to the other bolt would have been fine, but it wasn't. Connecting to the center one where the alarm wire is works great. I'm 100% confident that the rest of the wiring from the relay on back is properly connected and grounded. And yes, there is a lot of crap on the battery, so I'll take care of that soon.
 
Quick question- How did you figure out that was a 3 position switch? Nothing in that link says anything about it being a on/off/on switch. The diagram shows a "on/off" position only as far as I can tell :confused:


scion_on_off_switch_diagram.jpg



I also found the same witch in your link on Amazon for $2.50!
Amazon.com: GB Electrical GSW-45 Rocker Switch Lighted: Home Improvement



I have the Toyota OEM fog light switch for my front aux lights, but it's not a 3 position switch, which is what I'd want to wire the reverse lights up.
 
Quick question- How did you figure out that was a 3 position switch? Nothing in that link says anything about it being a on/off/on switch. The diagram shows a "on/off" position only as far as I can tell :confused:QUOTE]

Look over to the right of the page where you can select the quantity to add to your cart. One of the options is On/Off/On, for $12.99. That's it.
 
Good job, I also had mine connected to reverse at first, but eventually just chose using the manual switch instead...I hate seeing my 510's turn on and off going thru gears and shortening the life of the bulbs...No biggie though coz I can always reconeect one wire to re-activate that mode.

Yes, that is a valid point. These are just the simple 55w H3 bulbs, so I'll see how long they last and replace them when necessary.

BTW, before I joined I read your build thread from beginning to end multiple times, and I still check in on it whenever it gets updated. Best looking 4Runner I've ever seen. Great work.
 

Members online

Forum statistics

Threads
278,316
Messages
3,554,121
Members
248,016
Latest member
Advally Service

Trending content

Back
Top