E30 M30 Guage Issue

[E30 Beast]

I need you guys help installed the tach wire #21 from the c103 plug and plugged it directly to pin #9 on the c101 and nothing. did i wire it wrong? could someone help me diagnose this problem, its driving me mad crazy:crazy:

Mark

[E30 Beast]

Anyone care to elaborate on the first post, really need to get this thing running

[rav320uk]

'89 735i c101
1- blue
2- blue/white- oil static (check control)
3- white/black- fuel rate input
4- brown/violet- coolant temp
5- brown/green- oil pressure warning
6- green/white
7- green- start input
8- black/violet- dwa anti theft
9- black- engine speed
10- blue/yellow- dynamic oil (check control)
11- white/green- SI reset input
12- grey- Check engine light
13- green/violet- fuel pump relay pin 87
14- black/white- speed output
15- brown/black- park/neutral input
16- white/yellow
17- white/violet
18- black/yellow- starter
19- green/blue- programming voltage
20- brown/yellow- ground coolant temp sensor

[E30 Beast]

thanks rav just got her running (finally) really appreciate it

[1987E30project]

thanks rav just got her running (finally) really appreciate it

I'm doing my wiring so I might run into the same problem. What was the solution?

[Heysüß]

hey guys i'm having a problem with my tach as well. Fuse 21 keeps blowing off, I've been looking at the bentley but it really hasn't helped much.

mine is a m30b34 if that makes a difference. So I also would like to know what you did to get yours working.

p.s. mine worked fine since april and in the last three weeks i've been trying to unplug everything imaginable to see if i can find what's causing the short.

[rav320uk]

Fuse 21 7.5amp.

Glovebox light
Flashlight
Ignition Key/Seat Belt warning
Interior Lights
Radio Memory
Trunk Light
Active Check Control Service
Interval Indicator
OBC Fuel delivery
Tachom eter/Fuel Economy Gauge
Digital Clock Multi Function Clock

Check you cluster and make sure the batteries are not corroded.

[Heysüß]

thanks!

seems to be a short that wiggles with the wires. Thought I had it fixed this time around and I was putting everything back and now the OBC backlight did not work and when I turned on the headlights the inside gauge lights would go off. I'm pretty sure this is my fault though, I think i connected something wrong. redoing everything tomorrow :(

[Heysüß]

now you wouldn't happen to know if there is a separate relay that also works with the speedometer/ac controls/obc backlight lights would you?

I plugged in my defrost button into the wrong plug and now my gauge cluster lights along with the obc backlight are out. and my bentley doesn't arrive until thursday, got any ideas?

[rav320uk]

Not as far as I can see.
This link tells you what fuse operates what relay.

http://www.e30zone.net/e30zonewiki/index.php/Fuse_Box