85EastTxToy

1985 22R-EC Electronically Controlled Transmission (ECT) indicator wiring diagram question:
What are the pins and polarity that drive the two ECT dash indicators?

The 1st attached picture is of a Combination Meter (instrument cluster) from a 1985 Toyota pickup, which is similar to mine, that I pulled off google.
My truck's info: VIN: JT4RN66P7F5093420 MODEL: RN65L-PDCEA 557FQ41G282A340H
(the colored lines in the pic represent my "best guess" but I cannot find any documentation whatsoever to back me up).
Does anyone have a complete wiring diagram for this ECT indicator circuit?

My goal is to replace the instrument cluster in my 1985 truck with one from a 1986 donor truck in order to get a tachometer while retaining the two ECT indicators (NORM & POWER).
It appears that all (but maybe just some???) of the pin designation are the same
.. however ...
in ALL the wiring diagrams that I can find, there are omissions (eg: no mention of the ECT indicators)

The 2nd attached picture is of a Combination Meter from a 1986 Toyota pickup... this is my pic of the actual instrument cluster that I pulled from a junk yard.
Donor truck's info: VIN: JT4RN63S2G5006713 MODEL: RN61L-MSEA O33KH11G292W56
Does anyone have a complete wiring diagram for a 1986 Combination Meter?

The 3rd attached picture is of a comparison table that I made in excel.

Please keep in mind that I'm a noob when it comes to these trucks
{ but I was an Electronics Technician in the Navy for 6 years... ET2 (SW), specializing in Comm & Crypto }
Any info I've provided is simply my best guess based on hours/days of research but SHOULD NOT be considered the gospel..... not yet anyway....

The last pic is the mod I made to the 1986 combination meter in an effort to retain the 2 ECT indicators.

PIC1:

PIC 2:


PIC 3:


Also, in order to keep the ECT dash indicators, I had to modify the 1986 left-most panel (outboard-driver side).
There were 2 unused indicator slots at the top, so I scratched off the black coating on the rear and have ordered some 1/4" vinyl letters to label them.
Here's a pic of the modification:


Thanks for an amazing forum.
Any assistance with the 3 questions above is greatly appreciated!!!

wyoming9

iTrader: (1)

just where did your Truck come from??

In the EWD`s for both 85 and 86 I see no mention of those lights your trying to hook up.

might be the reason it is so interesting

Did that Cluster come from another Toyota ??

Truck built for other then North American Market ??

Edgee2004

I have a 1986 long bed pickup with a 22re and an a340h transmission. I think that my gauge is layed out just like your asking. I can take a picture of the font and back if that will help you??

wyoming9

iTrader: (1)

The strange think is it is not Shown on any of The EWD`s

Being Japanese they do things different

I found the schematic for the lights attached to the ECT computer not the combination meter or the lights

Op if you have The EWD for the 86 you should be able to figure it out I was exhausted when I looked before

the Normal is black yellow

The power is Green/ Orange

You do have the diodes and the resistor for the circuit you need the diodes or both lights will always be on

It grounds via a White/ Black wire

The lights are powered through the Pattern select switch