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OK; the mic shield wire will be on 2. The shield wire will wrap around the audio wire in that mic cable - whatever color it may be - will go to 1. Use some alligator clips to the other two wires and experiment. 3 should be shield for the receive to complete that circuit.
Use an ohm meter between the shield and the other two wires that are left to determine which wire is the mic switch wire.
Mic Wiring for stock 148 GTL 5 pin
1- Audio
2- Shield
3- Receive
4- Switch Common
5- Transmit
Once you get it wired up, maybe you can post the final color code for that mic/radio combo here...
Hello gentlemen and Ladies. I have the dreaded RCI-2990 receive issue where my radio gets distorted when people get close to my location. I found the C90 Capacitor, but I can not for the life of me find the C89 capacitor. Can or does anyone have a picture of the exact location of C89 ? Thank you in advance, Wes
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