Wiring aftermarket radio

Tiny
PACKERS27
  • MEMBER
  • 2001 GMC YUKON
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 260,000 MILES
First off, my OEM radio harness has the light blue in the 1 slot. A lot of diagrams do not show the light blue wire. My intentions is to use the existing to power the speakers. All I am doing is putting in an aftermarket radio. I have got the front two door speakers wired. The difficulty starts with the back two and the cargo sub-woofer along with the factory amp as it controls those speakers. I also has an RSA (rear seat audio) controller and it has something to do with that. It has been said that the pink wire on the secondary harness is wired to my power antenna on the aftermarket radio but I do not hear anything when doing so. I also hear that the orange wire does the same thing but no results. I also need to know how to wire up the RSA and rear speakers to make all of this work with my aftermarket radio. The radio is a Chinese brand 7018B. It does not seem like there is enough wires for it. No Bose. Factory Amp. Rear Factory Sub-woofer.
I am going to try to attach a photo.
Saturday, September 23rd, 2017 AT 6:16 PM

3 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,011 POSTS
Easiest way would be to simply run new wires to the rear speakers and just pull the fuses for the amp and unplug the OEM speaker connectors.
You CANNOT feed the OEM amp a speaker level signal, it will blow the input side of the amp.

RSA will not work without the OEM unit.

As for the power antenna feed that isn't a constant feed, it turns on, the antenna extends and as soon as it's extended the higher current draw shuts off the feed in the OEM system.
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Tuesday, September 26th, 2017 AT 6:14 AM
Tiny
PACKERS27
  • MEMBER
  • 187 POSTS
Ok. Just bouncing off your reply, when you say pull the fuses to the amp and pull the oem speaker connectors, do you mean pull the wires off the speakers and pull the fuse from the instrument panel that works the amp?

The power antenna orange wire isn't needed for the aftermarket radio? It seems to pick up stations fine, without it.

Also, does all modern aftermarket radios have a built in Amp. If so, does the quality compare the factory amp?

Finally, I noticed that I get bass out of the cargo speaker but no sound. Is it suppose to be that way? Will an aftermarket amp be compatible with this radio if I wanted to hook it up to an aftermarket 12" sub?
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Tuesday, September 26th, 2017 AT 3:58 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,011 POSTS
Yep, remove the OEM connectors and hook new wire from them to the new radio. Removing the fuses that power the oem amp is just to prevent shorting.

The power antenna ISN'T the antenna lead it is power for either an actual retracting power antenna, or on most newer cars it turns on the diversity antenna controller. Only used if you have those.

Unless it is a unit designed to work with an amplifier it has a power amp in it. They have to or you wouldn't hear much. A line level output would barely power a set of earbuds.

That is a subwoofer in the rear. It only reproduces low frequencies. You need all of the other speakers to reproduce the midrange and high frequencies. That is what the other 4 speakers do in that truck.
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Wednesday, September 27th, 2017 AT 2:57 AM

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