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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: rball716 on March 06, 2014, 09:54:43 am

Title: New truck...Hacked wires...Help ID?
Post by: rball716 on March 06, 2014, 09:54:43 am

(http://i65.photobucket.com/albums/h207/rball716/IMG_7573_zps434b1238.jpg) (http://s65.photobucket.com/user/rball716/media/IMG_7573_zps434b1238.jpg.html)

Upper cowl behind air filter

(http://i65.photobucket.com/albums/h207/rball716/0c18d1ca-b05a-45ca-af53-bace7122d55c_zps5feac1eb.jpg) (http://s65.photobucket.com/user/rball716/media/0c18d1ca-b05a-45ca-af53-bace7122d55c_zps5feac1eb.jpg.html)

2 spots coming out of the firewall below brake booster. The lower is 2 wires, green and blue. The upper is a big bundle that is cut off farther down.

(http://i65.photobucket.com/albums/h207/rball716/IMG_4609_zpsaa1e5306.jpg) (http://s65.photobucket.com/user/rball716/media/IMG_4609_zpsaa1e5306.jpg.html)

Here's the end of the bundle that's cut.

Anyone help me ID these wires so I can get started.

The PO installed new gauges. The temp gauge isn't "hooked up" I think that may be the green wire? The oil pressure gauge seems low/off.

Also the speedo is about 5mph high and bounces, I know it varies with speed being off. Smaller tires may be the issue with it being off.

Another Non electrical issue

(http://i65.photobucket.com/albums/h207/rball716/1bb5bf65-8ea1-464d-b12e-41915ed846ad_zpsd336388a.jpg) (http://s65.photobucket.com/user/rball716/media/1bb5bf65-8ea1-464d-b12e-41915ed846ad_zpsd336388a.jpg.html)

Anyone know what this is? Its on the frame below the radiator.

Thanks in advance

Title: Re: New truck...Hacked wires...Help ID?
Post by: dsgb610 on March 06, 2014, 12:09:26 pm

The last pic goes to your charcoal canister. I think it comes from the fuel tank.

I think that green plug in the first pic is for your A/C i think.

That cut bundle is maybve for cruise control? the one with the big hose.

Title: Re: New truck...Hacked wires...Help ID?
Post by: timthescarrd on March 06, 2014, 04:06:21 pm

The cut/taped bundle with the hose is Cruise Control.  Coolant Temp sensor is a dark green wire that comes out of the main connector and goes to the sensor on the drivers side head, look between the #1 and #3 spark plug.  I believe that the plug in the first pic is AC

Here's the wiring diagrams

http://forum.73-87chevytrucks.com/smforum/index.php?topic=11766.0