LACROMER
Junior Member
- Joined
- Jan 12, 2016
- Posts
- 14
- Reaction score
- 15
- Location
- New Bern, NC
- First Name
- Lacy
- Truck Year
- 1983
- Truck Model
- K10
- Engine Size
- 5.7L 350
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So I have a 83 K10 that the po cut out some of the wiring for the stereo, I'm trying to install a new radio and I can't seem to get power to the radio any help with what to connect to where would be greatly appreciated. Thanks in advance.
As 87ChevyR10 says, the radio wiring consisted of two harness connectors. One was the power, backlighting & ground plug. The leads were assigned as:
1. Yellow - ignition switched power (only hot when key is in RUN or ACC) via 15 amp fuse
labeled RDO.
2. Gray - power for radio back lighting. On the same circuit as the dimmable dash
lighting.
3. Black - ground wire.
The number of leads to the other harness plug(s) - for the speakers - varied with which stereo RPO package was supplied.
Looks like you have a 4 speaker system. The 8 speaker wires are pinched between your finger tips. The other wire - if it is black - is the ground wire.
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You need to find the hot (yellow) lead for the switched power supply. This will be connected to the red wire at your new HU's harness plug.
Additionally, you will need to run a new lead to a battery (always on) circuit. Without the constant hot power supply, your new HU will not retain your settings and the clock will reset to 12:00 each time you restart the truck.
If you should come across the gray wire, disregard it. Just tape it off and stuff it somewhere. Modern head units do not accommodate dimmable back lighting.
Below is a chart showing the standardized colors for HU wiring. Note that the ignition switched power supply comes in on the red wire. That is why (if you find it) your factory yellow must be connected there.
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Is there power at the factory yellow - when the ignition is in the RUN/ACC positions?
Also, I don't know if you noticed this:
Additionally, you will need to run a new power supply from a battery (always on) circuit and connect it to the yellow lead in the HU's plug. Without the constant hot power supply, your new HU will not retain your settings and the clock will reset to 12:00 each time you restart the truck.
In addition to the settings/clock not working, I should have also mentioned that the HU won't even power up without that uninterrupted battery power supply.
I dont know if there is power at the factory yellow im going to go buy a test light tomorrow and give it a shot. Thanks for the help. Also is there another wire or fuse i could hook the (always on) circuit to. Im trying to minimize the wires running through the dash and under the hood so i want to avoid hooking it up directly to the battery if at all possible. Thanks again for all the help. Im new to wiring so its a learning experience.