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Hi I have a 1993 ford f150 with a stock radio and it keeps randomly loosing memory how could this be fixed

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It sounds like it could be wire or a fuse I'm willing to bet the fuse is going out

Posted on Nov 21, 2014


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You are loosing power to the keep alive memory circuit of the radio. I think you may have a defective ignition starter switch. Also there are two hot wires to the radio, one powers the radio, one holds memory and is called the Keep Alive Memory constant power wire. Here is the wiring colors, pull the radio and check the memory power supply wire.
Radio Constant (keep alive memory) 12V+ Wire: Light Green/Purple wire

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Does the stock radio - cd player that comes in a 2011 F150 XL single cab come with preamp outputs?

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On my 1993 ford ranger i ran a self Diagnostic on it and came up with error code 512 which is Keep alive memory test failed. Could someone explain in detail thanks in advance

keep alive memory is required to save all the adjustments the coputer has made to compensate for engine wear/drive habbits/altitude/fuel system problems like vac leaks etc.
there is a base program in the read only memory that cant be erased by loosing power to computer this program is designed to start and run a brand new vehicle good enough to let it make its minor adjustments as it sees fit.sort of like an electronic fine tune.
that code you have means the coomputer is loosing its power supplie it needs to keep the random acces memory from being erased.
check the fuse ALL fuses some fuses feed other fuses they are not labeled as such on the fuse boxes.i would go for the cig lighter fuse first but like i said check them all.if no blown fuses then your gonna have to trace keep alive memory [or b+]wire from computer on back untill you find the broken wire etc.could even be a bad computer but i dought it

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1 Answer

Ford focus radio keeps cutting out randomly,dose anybody know of a fix or why this keeps happening?

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I have a 1990 Ford F150 4wheel drive pickup; and it is equiped with a straight 6 cyl. engine and an automatic transmission w/overdrive. What years of stock production transmissions will interchange with my...

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Dec 30, 2009 | 1990 Ford F150

1 Answer

ABS light on 1993 F-150 ext cab is on and off

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1 Answer

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