7a code reader

[Beetie]

My mate wondered if anybody could make one of these, or where he could get one from?

[4WheelDrifter]

It’s pretty easy to make. Just an LED and a switch in a box. Then plug the wires in to the usual place.

[Beetie]

Sounds easy Ok so how do the wires connect in the box?

[4WheelDrifter]

Ah. found it!
Just wire the switch instead of the jumper wire.

http://www.s2forum.com/forum/showthread.php?t=6346&highlight=LED

[Beetie]

Thanks mate ill let him know! Not sure if he can be bothered to make one tho! Looks like ill have to do it

[4WheelDrifter]

I've just stuck with the LED and the jumper wire. It's more portable. The box makes it look like there's more to it. Who knows what ingenious gadgetry could be inside!?

[Hidshadows]

http://www.20v.org/fault.htm

[mcandmar]

I found this site that covers the topic well, its in german.

http://www.landshut.org/bnla01/members/kaindl/Anleitungen/tipps/eigendiag/eigendiag01.htm

I have a post 90 car and use the fuse in the fuel pump relay as a trigger. Same method as used to set base idle speed, fuel mixture etc.