"hot in acc and run" ???def'n???

[evan 10+ year member]

I pulled the stock radio out of my truck and I've got three wires that I need to use. They are black, grey, and yellow. My Haynes manual shows this:

I know that the black will go to the ground on my harness, but which of the grey and yellow on the truck is the ignition wire and which is the battery wire? What does "hot in acc and run" mean?

Click to read more...

 

[RandyJ 10+ year member]

where did you get the phrase from?

 

[stones 10+ year member]

Look at this, it will make more sense.

http://www.installdr.com/Harnesses/GM-Wiring.pdf

 

[evan 10+ year member]

where did you get the phrase from?

If you look at the picture I included of the Haynes manual, it is the phrase that describes what the yellow wire leads to.

 

[evan 10+ year member]

Look at this, it will make more sense.http://www.installdr.com/Harnesses/GM-Wiring.pdf

According to that, the yellow is the constant power, and they gray is a headlight dimmer wire. Does that mean I have to run and new wire to act as my battery wire? (I don't have the orange one that the site says I should)

 

[Slody4Futbol 10+ year member]

yes... if what you have is a 78 c-10 then yeah you have to run a new wire... the old radio was a shaft radio correct? it had no reason to have a constant memory wire because there was nothing to remember... such as digital presets or anything.. so run a new wire... and are you just keeping the one speaker or adding some?

 

[evan 10+ year member]

yes... if what you have is a 78 c-10 then yeah you have to run a new wire... the old radio was a shaft radio correct? it had no reason to have a constant memory wire because there was nothing to remember... such as digital presets or anything.. so run a new wire... and are you just keeping the one speaker or adding some?

Thanks. Are you an installer? It sounds like you have delt with my type of truck before. I'm not going to be using the one stock speaker and I'm adding a four channel amp to run my two 5.25's and a 10" sub.

What type of wire should I use to run the constant power, and where do I run it from?

evan

 

[Slody4Futbol 10+ year member]

just some 14-16 gauge wire... fused at the battery... or fusebox... there should be a spot on the fusebox that is constant and you can put a spade terminal in it... just make sure to fuse it as close to the power source as possible...

 

[RandyJ 10+ year member]

Im using firefox and for some reaosn I cant see any images unless they are a certain format i guess.

 

[Insomniac119 10+ year member]

hot in acc and run=the wire is supplying current when the ignition is in the accesory position and when the engine is running.

 

[req 5,000+ posts]

how about you steal the constant wire from the steering column. there should be a bunch of wires behind the dash under the steering wheel that hook into a few different harnesses.

you should be able to tap into the constant wire there, or go from the fuse box thats under\in the dash too. eaither will work. i think you should be able to use that grey wire as the illumination wire (orange\while IIRC) - anyone else?

 

[Insomniac119 10+ year member]

The fuse box would be easier IMO. You can buy things at radioshack called fuse taps that make it real easy.

http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F004%5F001%5F000&product%5Fid=270%2D1204