# 1999 Chevy Blazer cant figure out where all the wires on the headlight wiring harness plug into

**URL:** <https://community.cartalk.com/t/1999-chevy-blazer-cant-figure-out-where-all-the-wires-on-the-headlight-wiring-harness-plug-into/81201>\
**Category:** Maintenance/Repairs\
**Created:** [September 3, 2013, 10:41pm UTC](https://community.cartalk.com/t/1999-chevy-blazer-cant-figure-out-where-all-the-wires-on-the-headlight-wiring-harness-plug-into/81201 "2013-09-03T22:41:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Sybouts](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Sybouts](https://community.cartalk.com/u/Sybouts)\
**Post date:** [September 3, 2013, 10:41pm UTC](https://community.cartalk.com/t/1999-chevy-blazer-cant-figure-out-where-all-the-wires-on-the-headlight-wiring-harness-plug-into/81201/1 "2013-09-03T22:41:30Z")

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I bought a 1999 Blazer that had some very significant damage to the front end. This was to the point of needing to replace the Radiator housing ( this is what i have been told it was called it is the part that houses the front radiator). I have successfully taken the damaged one off, and moved the front radiator to the new one and it is back on the car. However the problem I am running into is that I had to pull the entire headlight wiring harness from the passengers side through the drivers side now there are a bunch of plugs (other then the headlights) that I cant figure out where they go. I have searched and searched for a diagram or schematic of this harness and have been very unsuccessful. Please help.

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**Author:** ![Sybouts](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Sybouts](https://community.cartalk.com/u/Sybouts)\
**Post date:** [September 3, 2013, 11:01pm UTC](https://community.cartalk.com/t/1999-chevy-blazer-cant-figure-out-where-all-the-wires-on-the-headlight-wiring-harness-plug-into/81201/2 "2013-09-03T23:01:08Z")

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I found out that it is actually called a radiator support that I had to take off. Now I just need to know how to plug everything back in

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**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\
**Post date:** [September 4, 2013, 12:31am UTC](https://community.cartalk.com/t/1999-chevy-blazer-cant-figure-out-where-all-the-wires-on-the-headlight-wiring-harness-plug-into/81201/3 "2013-09-04T00:31:59Z")

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Now you know why you should take pictures during disassembly! They are invaluable when putting it back together. A lesson most people learn the hard way.

Now you need the Chassis Electrical Schematics and wiring diagrams. Good ones show the engine bay wiring routing and connections. Here’s a starter for example- [http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f80cb0c2a](http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f80cb0c2a)

Manufacturers make very detailed books for this purpose. You could buy yours through Helm Inc. Good chance you can figure it all out using the cheaper versions above or in a Haynes manual though.

Good luck.