e30 s52 swap tach mpg temp gauge not working

[duval7]

do you have the e30 temp sensor in the head? it ur temp wont work with stock e36 temp sensor 2 pin plug. do not remove the 4 pin that goes into your ecu. as for tach and mpg there 3 wires in the glove compartment. i had the same issue i just wire those 3 and worked

Yes I have the correct sensor for the coolant; e30 Browntop. I also wired it in correctly, slicing the BR/VL wire to the sensor. What are you supposed to do with the wires at the c103? nobody ever explains what you need to do with the c103 connector wires. Are they spliced into the engine harness?

[chris_rai]

check the board batteries, if it's dead, tach and temp gauge will not work. i had the same issue, because the car was off battery for a long time before the transplant

[knuklehead92]

do you have the e30 temp sensor in the head? it ur temp wont work with stock e36 temp sensor 2 pin plug. do not remove the 4 pin that goes into your ecu. as for tach and mpg there 3 wires in the glove compartment. i had the same issue i just wire those 3 and worked

[duval7]

I am having the exact same problem. I have searched and this doesn't seem to be documented anywhere. My fuel gauge works tho!

[corzi]

Guys,

I m just done with my s52 swap on my 1987 e30 325is.

i m running into some problems, the tach, mpg and temp gauge are not working.
I try with an other cluster and same problem.
I m using an akg adapter, do i need to do any other wiring or should it work like that?

let me know if you have any idea thanks