Fitting an Electronic Instrument Cluster

Fitting an Electronic Instrument Cluster

I) New mileage :

Technical information :

Vss supplys a square signal. 1.3889Hz/ Km/h or 5000 pulse by Km Let’s make a variable frequency generator in order to simulate the speed.

Components needed :

A power supply (12v) A NE555? A 10µF capacitor (C1) A resistor of 200 Ohms (R1) Another resistor of 560 Ohms (R2) with a LED 20mA (D1) (optional) And a variable resistor (range 0 – 10 KOhms?) (P1)

Pin Configuration

This is the schematic :

Schematic

Built :

Built

And connected :

Connected

Now you can wait until you arrive to mileage you want. Enjoy!!! or play with it

Working

II) Fitting :

First thing, remove the airbag management off the new one, and adapt it to the old one to prevent the airbag warning light being constantly on. Look at the small card, and cut the wire which goes from the pin 5 and from the airbag warning light. Then join pin 5 to the warning light as it’s done on these pictures.

Pin 5 Wiring

Original Wiring

Wiring After Mod

Then remove your old instrument cluster, look at your plugs, on the longest, run a permanent 12v (otherwise each time you will put 12v your needle of speed will jump) to the pin 7. I took the wire from the cigarette lighter but you can take it from another source like the radio

Permanent 12v Wiring

Last modification, now look at your shortest plug, run a new wire (VSS signal (vehicle speed sensor)) from your AWS unit or your trip computer (otherwise from your engine bay) to pin 6. Like it’s done on this picture.

VSS Wiring

Finally plug in the speedo, check you haven’t blown any bulbs and enjoy!!!!!

Fitted!

PDF Version

That's it!

Created by DjFox?

Extra Addition What if I have neither an AWS or Trip Computer You need to run a wire from the big plugs near the airbox. This wire needs to run from pin 2 shown below:

Pin2 Wiring

Plug Location

Image courtesy of Mirez.co.uk