I also was wondering about the white wire...yes it is definately white and it clips into a black connector on a dark green wire, I am putting an after market stereo into my k1500 and was wondering if this was a ground.
Hello! The ALDL or On Board Diagnostic I (OBDI) connector is located under the dash on a 1993...And is different then the 94 you looked at...See diagram below...Is there a wire on "A" and "B"? "A" is a White/Black wire that changes to Black/White at the ALDL connector on pin "A"...and should read to ground..."B" is data and is Orange...These are the two wires that are shorted with a paper clip to get the trouble light to "blink" out a trouble code...I DO NOT see a connection between the fault that you have and the ALDL connector, Although the connector may be missing a wire (easily checked)...LETS SOLVE!!!
The problem appears to be be a lack of a connection to the Yellow ignition wire which could appear White...It's the ACC ignition power to the radio...Just because the lights are on doesn't mean the radio itself has power from the ignition...Also The Orange ignition wire (hot at all times) maintains memory to the radio...The White? wire out out the back of the radio appears to be the ignition wire...If there is already a Yellow wire connected to the radio plug that has 12 volts on it when the key is turned to ACC let me know...
Bottom line...Are there wires in both slots of the under dash ALDL connector??? And is there a splice into the Yellow ignition wire...SEND A COMMENT .saailer
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Hello! First of all what does not work correctly? Reason i ask is older wiring can mislead as the color ages...That single white wire from the radio MAY be faded Orange...In that there isn't a white wire involved with the radio...Also can you further identify the green wire (dark or light?) or is this the one that's missing? Lastly what is a "Clip"? Do you mean a connector plug?...send a comment ...Guru...saailer
This is the older radio where there is an am/fm radio above the climate control and a cassette player in the center of the dash. The wire harness from the am/fm radio ends in a clip that plugs into the in-dash amp. From this clip, comes a single "white" wire. I will look more closely to see if it is a faded orange. This single wire ended in a clip that connected to a dark green wire. I went to a salvage yard today and looked at a 94 c1500, tracing this wire through dash to the connector plug just to the right of the hood release pull. It was where you plug the computer readers into the car's computer system. Only thing is my 93 does not have a green wire coming out of this connector plug. The buttons illuminate when the head lights are on, but will not power on.
The connector plug by the hood release pull
is referred to as the Assembly Line Communication Link (ALDL) connector.
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