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Thread: Need How-To: Keep Radio on while cranking.

  1. #1
    Registered User
    Name: Clinton


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    Need How-To: Keep Radio on while cranking.

    I need to know how to keep my Avic z120BT from shutting down between the ACC and Starting of the truck.

    When I put the key in and move toward the Start position (has to go through the ACC position first), it comes on, then shuts back down when you go to crank the engine. I know it drops all voltage to all accessories to give the starter max amps, but I hate that the radio starts to boot up then is immediately shutdown and has to restart within seconds.

    Anyone got any advice?

  2. #2
    Registered User
    Name: Clinton


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    I found a device that looks like it may help me out.
    PAC TR-7

    Battery/fuse +12v constant--->>>>>---(existing yellow HU wire)-----> HU
    blue TR-7 wire -------------->>>>>---(connect to red HU wire)------> HU

    ACC ------------------------->>>>>-----green TR-7 wire
    (- ground) ------------------<<<<<-----black TR-7 wire
    Battery/fuse +12v constant--->>>>>-----red TR-7 wire

    A simpler explanation:
    --cut existing red wire and splice hot end to TR-7 green
    --splice TR-7 blue wire to the red to HU (the other end of cut
    --connect a tap off existing yellow wire and splice to TR-7 red
    --connect TR-7 black wire to ground

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