Need answers on two plugs behind glove box that feed thru firewall passenger side.

[Jonesiianthony1]

I have a 1998 k1500 with a 1996 k 1500 harness and pcm. Due to the passlock giving me issues on the 98 pcm.. I swapped the harnesses and am stuck on the two connectors behind the glove box.. inside is a 12 pin plug and 1 pin plug. The 96 harness has a 7 wire plug and a 3 wire plug. I cut the connector off and connected the best I could according to color and size. This leaves me with 5 wires that go to nothing on the bigger plug..... I have no brake lights, no gas gauge, no oil or temp sensor. Don't know if this has anything to do with it. I didn't have speedo untill I did this. So my question is what do i do with these remaining 5 wires

 

[Erin]

I have a 1998 k1500 with a 1996 k 1500 harness and pcm. Due to the passlock giving me issues on the 98 pcm.. I swapped the harnesses and am stuck on the two connectors behind the glove box.. inside is a 12 pin plug and 1 pin plug. The 96 harness has a 7 wire plug and a 3 wire plug. I cut the connector off and connected the best I could according to color and size. This leaves me with 5 wires that go to nothing on the bigger plug..... I have no brake lights, no gas gauge, no oil or temp sensor. Don't know if this has anything to do with it. I didn't have speedo untill I did this. So my question is what do i do with these remaining 5 wires

I can't help, but the guys that can usually like pictures to get a better handle on the problem.

 

[Blackcat84357]

I have a 1998 k1500 with a 1996 k 1500 harness and pcm. Due to the passlock giving me issues on the 98 pcm.. I swapped the harnesses and am stuck on the two connectors behind the glove box.. inside is a 12 pin plug and 1 pin plug. The 96 harness has a 7 wire plug and a 3 wire plug. I cut the connector off and connected the best I could according to color and size. This leaves me with 5 wires that go to nothing on the bigger plug..... I have no brake lights, no gas gauge, no oil or temp sensor. Don't know if this has anything to do with it. I didn't have speedo untill I did this. So my question is what do i do with these remaining 5 wires

What did you end up figuring out? I'm in the same problem your in right now and would like some advise

 

[jd33173]

Did you take a look at the wiring diagram for your yr/model? Manuals are avail on the site for free..

 

[GoToGuy]

If your not using the wire diagrams from the year trucks your trying to match up. How do you know your splicing into the correct circuits. Would you bet your life that GM kept the same wire/ circuit ID colors from year to year? Just as you found the connectors are different, the circuits are different. GM was constantly upgrading every year.

 

[Blackcat84357]

Did you take a look at the wiring diagram for your yr/model? Manuals are avail on the site for free..

Where can I find the wiring diagrams for wires behind the glovebox

 

[jd33173]

Where can I find the wiring diagrams for wires behind the glovebox

Here ya go

88-98 Service Manuals

Over the years I have collected a bunch of GM service literature. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/} If you're not...

www.gmt400.com

 

[Blackcat84357]

Here ya go

88-98 Service Manuals

Over the years I have collected a bunch of GM service literature. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/} If you're not...

www.gmt400.com

There is a lot of information in these. But I couldn't find anything about a wire or connector behind the glove box

 

[termite]

There is a lot of information in these. But I couldn't find anything about a wire or connector behind the glove box

Its in there somewhere. You'll need to find the schematics and diagrams for each year and model you are trying to mate.

 

[east302]

For 98, at least, you’d be looking in volume 1 in section 8A. It has the connector diagrams and number (C###). The associated pinouts are also in there and should give you what you’re looking for.

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