Waterproof Fuse and Relay Boxes - RFRM (10 relay) & RTMR (5 Relay) no Blue Sea/ SPOD

Those wires are coming to (green/red) and away (white/green) from the dimmer knob (rheostat). If you have a copy of the wiring diagrams for the 95-00 look for a similar image (or doc search for "rheostat") and you should be able to find out which color wires to tap into.

*The third wire (white/black) from the rheostat in the diagram is there to make sure the current reaches it's load and it looks like it could be absent in earlier first gens.

 

Hey, for second gen, which wires do you tap for illumination when you tap directly from the dimmer switch? I tried tapping solid green to pin 6 and dark green with white stripe to pin 7 but the switches did not light with or without the headlights being on.

Please help!

 

Its a 2014 if thats relevant

 

Also, I was told the switches i bought used were lower light independent, so lower light comes on with headlights, and upper light comes on with whatever accessory it's wired up to. Is there any way to confirm this?

 

So I looked again at my wiring. The solid green from the dimmer rheostat becomes hot with the parking and headlights. I'm guessing the dimmer negative is in fact the green with white stripe as many have said here before. Both wires are common to the other plugs for my other oem lighted switches, VSC and RSCA.

Another wire, white with black stripe is common the all the plugs (dimmer rheostat, VSC, RSCA). I tried jumping the white/black wire to pin 7 (with solid green on pin 6) and still no illumination. Tried headlights on/off, otrattw switch on/off, no combination gave me illumination.

 

Green and Green/white are the wires you need..

 

have you tried testing the switch illumination just in case your switch is faulty?

 

How should i test illumination?

Heres what I tested just now. Pin 2 is hot always, regardless of headlights or otrattw switch position. Pin 6 becomes hot when parking lights and headlights are on. Pin 3 becomes hot when the otrattw switch is activated. So when parking/head lights are on and otrattw switch is activated pins 2,3,6 are all hot. Pin 8 goes to a good ground. I know its good because I've used it as a ground for my test probe. Pin 7 goes to the green with white stripe from the dimmer rheostat. Seems like it should be working...

 

could use a 9v battery and just put a negative lead to pin 7 and positive lead to pin 6. Given what you have already tried I would check to make sure the light itself in the switch is not faulty in any way.

 

A bit more info. I hooked up one of my light bars temporarily, light bar positive to wire from pin 3 and light bar negative to battery negative, no relays, and it worked like it should, but no illumination at the switch.

Also, I should be getting illumination INDEPENDENTLY from any accessory being wired up right? That is, even with pin 3 not connected to anything, I should still be getting illumination on the bottom led when the parking/headlights are on, right?

 

Gotcha, will report back!

 

So testing switches directly from battery. Pin 7 to neg pin 6 to pos I got no illumination. However when I jumpered pins 8 and 3 in addition to powering 6 and 7 upper light came on. That is the light on the pin 7 and 8 side of the switch body. With 8 and 3 jumpered the upper light stayed on regardless of switch position.

No activation in any way lit the OTHER light on the switch body.

 

This is drivin' me nuts!

 

With power going between pins 6 and 7, they should have definately lit up. When 8 and 3 were jumped, upper light came on, that much is normal. With 6 to + and 7 to -, and 8 and 3 jumped, all lights should have been on.

 

That all sounds correct. I've never used OTTRAW switches but there pin outs seems pretty simple. I would say unless you have somehow mixed up the pin numbering on the switch then it sounds like you may have a faulty illumination light.

 

I just tried battery positive to pin 8 and battery negative to pin 7 and got the upper lamp to light. That leads me to believe that these switches are upper independent.

http://www.otrattw.com/F76a.pdf

On lower independent switches, pins 7 and 8 are not connected at all.

http://www.otrattw.com/J66a.pdf

I still could not get lower light to come on, even taking bat pos to pin 3 and neg to pin 6 (assuming yhe switches are upper independent)

 

Ordered new switches. At least now I'll know what they are for sure. Lower independent, that's how I wired my switch backs.

Thanks for the help guys, I'll post up my results when I have some.

 

Okay... here are dimmer wires and unused wires/connectors/harnesses lurking behind my lower dash.

1998 Tacoma Xtra Cab, 5-speed manual, SR5.

Need help identifying some wires/harnesses please. I ask because I'm trying to hook up dimmable illumination to my switch backs (built by @skygear) and need to know what to tap into. I do not have a clock or wires that go to it (that I know of) and I do not have an ashtray light bulb or wires that go to it.

Here are things that I've found under my lower dash.

#1. This is located just under the steering column (you can see it in the background). This wire harness has two wires going into it. Blue with yellow stripe and red with black stripe. 3+ years ago two people told me two different things, with no confirmation: Could be the wiring for the clock, could be the wiring for the factory alarm system. Two things that are not equipped in my truck.



#2. This is located behind/below the dimmer knob/clutch cancel/rear locker switch area. This wire harness is literally just hanging there. It has three wires connected to it. Yellow with green stripe, green with red stripe and yellow with black stripe.





#3. These are the wires that are leading to the back of the dimmer switch. At least as far as I can tell. There are a couple of other plastic housing between the back of the knob and these wires. As far as I can tell the wires are yellow with green stripe, yellow with black stripe, and possible two more that I can't really see.



I attached the wiring diagram (46 pages) for my truck. I honestly don't even know where to begin to decipher this thing.

Any help is appreciated.

 

This first gen lower switch lighting that dims is becoming a real pain in the ass!! On my truck there is ONLY TWO WIRES off the back of my dimmer knob, one white with green stripe the other is white with black stripe. I'm waiting on some posi taps to get here and then I'll try and tackle this again. When they get here I'll tap into the white with black stripe (as per skys recomendation)as my illumination ground. As of now I have tapped into the white with green stripe as my illumination positive and they dim backasswards. So I'll tap into both of those wires and hopefully get a correct dimming set of switches.

 

Madjik good news, your wiring diagram shows the same color wires.

So, you should tap into these wires (cut back on the plastic sheath a bit to access them better):

and run them to the back of your switch like this:

If you are running more than one switch, run the G-R wire to the first switch in line (position 6) and the W-G to the last one (position 7), then jumper the 7 to the 6 on the switches in between.