'99 Tahoe - New Head Unit = No Sound From Rear Door Spkrs

Folks, Here is my situation:
- Have a '99 Tahoe w/ six speaker factory setup. - Pulled factory unit (w/ slave CD) to install Pioneer DEH-P4500MP head
unit.
- Front door & rear *overhead* speakers work fine. - Rear *door* speakers are dead.
## I've read about the blue factory antennae wire fix, but there is NO blue wire hanging around the stereo box of the dash. ## I even cut the blue wire going to the slave CD harness and attached it to my aftermarket wiring harness (for Pioneer head). That didn't help.
- Used GM color code chart to ID front and "rear" (don't know which "rear" - doors or overhead) speaker wire in Tahoe's harness. - Only four speakers on GM color code chart, so this didn't really help at all.
- There are two wires on the Tahoe-side harness that do not match up to the head unit's harness -- dark green/black & dark green. IOW, these wires are on the Tahoe-side harness, but there are no wires connecting on the aftermarket harness used to connect the Pioneer head.
Lastly, need a wiring diagram or **SPECIFIC** advice on making the rear door speakers work without running new wire. I'm a computer whiz, but a auto mech noob. :-) Please help!
CharlieJ
THANKS!
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Your new radio probably came with a new harness connector kit. When you connect it to the wires from the new radio, you will need to " cross connect " by changing color, power antenna from new radio to the pin out to the antenna from the old receiver unit. Should be ID'd on old receiver box . Went through this previously ('93 Burb). Door speakers are powered from CTSY fuse via relay , in my case that is! Good luck Respectfully submitted Rolf
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.