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View Full Version : Need Help Getting Speedometer to Work...already searched


RyanA96
05-04-2006, 07:43 PM
Ok so heres the deal, i have a 93 240 with Redtop. The speedometer is a digital and worked before the swap. Now it will turn on but just read 0 all the time. I've narrowed down that its not the sensor itself because I checked the resistance and it went up and down with speed, so its not the sensor. I really think its just a wiring problem.

The 2 wires coming out of the vss are Green and Black. Now their are 5 plugs to choose from....
1) Yellow/blue and Black
2) Green/orange and Black
3) Green/white and Green/blue
4) Yellow/red and Black
5) Yellow/Blue and Yellow/black

I'm 90% certain its #5 because by looking up in the FSM it showed the 2 wires coming off of the HeadsUP Display unit going to the VSS as Y/L and Y/B. (the L in Y/Lis light blue, correct???).

I really didn't hook it up very good to this plug but it still didn't work. I'm thinking its either I didn't hook it up good enough or their is another gap in the wire somewhere between the plug and HUD display unit.

Before I dice up my harness even more, please help if you know how to figure this out....thanks

g6civcx
05-05-2006, 10:31 AM
L = Blue. B = Black. LB = Light Blue.

Maybe your cluster is broken. HUDs do that sometimes.

RyanA96
05-05-2006, 11:36 AM
Nevermind problem fixed. It is the #5 plug. Hooked up green to Y/L and black to Y/B and it worked. Finally a SPEEDO YIPPPEEEE lol