Pioneer GM5400T 2-Channel Bridgeable Amplifier
Problem for Pioneer GM5400T 2-Channel Bridgeable Amplifier

Hooking up amplifier to stock radio in Lexus ls400 1991




By tietzrwer on Aug 23, 2009

" "
We have removed the factory radio. The instructions from the new Pioneer 2-channel amplifier say to locate the turn-on wire (usually BLUE) but there are severed blue wires toing into the back of the radio. None are obviously a turn-on wire. How do I dtermine which one it is? ALSO, in the section "Making the Signal Connections" it says to connect the RCA patch cables to the RCA outputs on the radio- BUT the radio has NO RCA outputs. Help please.
Signed,
Robin
mother of 17yr old son who's trying to install
Comments:

Aug 28, 2009

- Thanks for the tip. Went to Walmart and they don't make a kit for the 1991 Lexus ls400. So, he has everything attached except the signal leads to run the subwoofer. Ok, Need to figure which wire (color) from the back of stock radio feeds the signal to the amp and subwoofer. Lexus 1991 ls400 thank you so much. Robin Tietz

Best Solution

posted on Aug 23, 2009
Very Helpful)

bill_48632

Rank: Guru 
Rating: 93%, 104 votes
Hi Robin, I think I may be able to help. The instructions are referring to an aftermarket stereo and not the factory one. Most aftermarket stereos have a blue wire that runs either the power antenna or an accessory that turns on with the radio(amp, eq, power crossover,ect.) As far as the RCA cables, once again, most aftermarket stereos have RCA outputs for an amplifier. Factory ones don't.You can go to Wal-Mart or ABC warehouse and buy a wire harness just for this particular application and then all you do is plug the harness into the factory harness, everything is all pre-wired so there is no guesswork involved and no mistakes.
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" Great advise! Went to Walmart, they had harnesses but unfortunately they don't make the harness specific for the 1991 Lexus ls400. Bummer.Thanx again! " - tietzrwer

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