need help finding ground for radio.

[Steven_Anderson]

Ok thanks again.

[StereoInstaller1]

The tach signal is AC voltage, so you can't use a test light to test it.

[Steven_Anderson]

is there a way to check if the tach is getting a signal with a test light Still having problems with it I have swapped in two working SI boards and it is still not working.

[StereoInstaller1]

If you own an E30, you need one.

Now go kick its ass!

Luke

[Steven_Anderson]

:shock: srsly???? i have 3. and 2 test lights...

Yeah The only other time I have installed a stereo was on a 98 subaru so the wires are the same color making things easy.:)
Wiring n00b here, but you have to learn some time.

[Cabriolet]

Picking one up today. I have never had a need for one before.

:shock: srsly???? i have 3. and 2 test lights...

[Steven_Anderson]

Picking one up today. I have never had a need for one before.

[StereoInstaller1]

Hell, solder some wires on a lightbulb for all I care, get a testlight!

[DRTSRFR]

Harbor Freight test light $3.99

[StereoInstaller1]

What wire lights up your test light when you turn the key on?

[Steven_Anderson]

What color should the 12v acc be? on the diagram it has it as purple and grey but I don't have a purple and grey wire. thinking that this is the problem.

[DaveSmed]

I swear I am gonna ban the next sumbish who doesn't have a test light when trying to install a radio.

Get a test light.

NOW!

Luke

Holy shit, I just noticed this.

Congrats on the promotion, a supermod at that.

[e30 gangsta]

^ word. The stock e30 ground sucks anyways. I still have a/c hum and I cant figure out how to get rid of it. Any suggestions would be greatly appreciated.

[zshopa]

Why don't you just ground it to the metal cage that holds the headunit in place just sand it well and put the wire under a bolt

[Teaguer]

I swear I am gonna ban the next sumbish who doesn't have a test light when trying to install a radio.
Get a test light.
NOW!
Luke

Definitely good advice and you would also thing just good old common sense.
Trouble is this guy, like a lot out there, would not know what to do with a test light.