Question about 1987 Mercedes-Benz Mercedes Benz 190 Class
Wire color is what
Your car should have an ISO connector, all newer radios also have ISO connectors, one for the 8 speaker wires and one for the power block, they cannot be connected wrong.
If on the other hand some muppet has chopped off the connectors instead of using a proper converter connector then you should reinstall new ISO connectors.
You will need:
A 12v test light or a multimeter set to 120vdc
some masking tape to make labels and a ped to mark the labels.
A quick test to establish the correct wires is.
using your 12volt test lamp or multi meter, find a wire that is live when ignition is off, this is your +30 live, now switch on ignition and find one that is live, this is your+15 live, now switch on the lights, is there another live? this is your lights or dimmer wire. with the lights and ignition on connect the live lide of your tester to the +30 wire and find one that is earth, (you should be running outof wires by now anyway, this si your earth or ground wire.
The speaker wires will probably be seperate and if you have a bunch of 8 wires, that's them.
you will find there is a prime color and another with the same color but with a trace, so make into pairs, ie, red and red/white, green and green/white etc.
using a 1,5v AA battery touch each pair very briefly in turn, the corrisponding speaker will 'pop', mark up front left etc.
There ya go, all sorted.
Posted on Mar 31, 2009
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