New Radio Extra wires & No Power

ck here...

https://www.fiero.nl/forum/Archives/Archive-000003/HTML/20110502-6-065656.html

May be an amp trigger wire, Light green, not getting signal back from new stereo. Check against old plug.

Try to check the wire connection, you may have a lose wire

Very strange, if you are positive that the radio unit is problematic, it might be a cold soldering, defective capacitor which works on higher temp or similar. For replacing, in the simplest case, get access to the back of the present unit. Write down the wires and according to the manual for the new unit, connect them. Fix the new unit in place.

Not sure but you may have a radio that needs a code input. the radio thinks it was taken out and a code needs to be put back in at the proper time. if you bought the truck new it should be in oners manual. if not you have to get it from a dealer. you may have to pay for it.

Somehere in the owners manual or the supplimentary sound system booklet, you should find a hand written number, it should be about 4 digits long. That is your radio lockout code.

hmm well there are 2 solutions to this that i can give cause i dont have the wiring diagram for that truck..

The first would be to set with a multimeter and test the wires under the dash for the hot, and axcessories wire.

The second would be to run 2 wires directly from the battery to the inside of the vehicle and connect the radio using that.
The second solution is self explained so lets discuss the first.

The truck came with an original radio. connected to this raid is a jack with a bunch of wires. remove the connector. with keys out the ignition test every wire until you get 12V.. thats your hot wire. this wire always has power. Now lable that wire and push it aside. turn the ignition on and test the remaining wires until you get 12v .. thats the ignition wire or acesories. this only has power with the ignition on. The remaining paired wires are for the speakers. connect the new deck and vonnect the wires one pair at a time to determine their location. or ypu can look at the wires connect directly to the speakers to see which wires go to which. .. you can use the body of the truck as a ground.

In many cars the factory speakers are powered by an external amplifier. If this is your case you must get power to the amplifier or run new speaker wires from the head unit to the speakers. Running new wires is easier.

will it power up at the moment blck wire is always an earth to dash what sort of stereo is this