Please identify these parts!

[nab407]

I have torn out my old harness because it was a rats nest and I'm replacing it with a brand new universal harness. I've labeled where everything goes, but I just want to know what these random boxes/switch/relays are.

My truck is a 1983 Chevy K10 6.2L Diesel with A/C, cruise control, and automatic transmission.

This is located on the steering column support:

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This is mounted on the firewall:

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This is mounted on the steering column near where it exits into the engine compartment:

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[kdo58]

bottom picture is the neutral saftey switch and is also back up lights, the top 2 i have no idea.

 

[J Knight]

I believe the second pic is for the power windows

 

[firebane]

not sure on top pic but last pic looks like horn relay.

 

[MadOgre]

I believe the second pic is for the power windows

That's what I was thinking too. @chengny would know for sure.

 

[bucket]

I thought the second pic is the relay for the power locks. The wire colors look right for it too I think.

The first one has me confused. It looks like the wiper switch harness, but I have no idea why it would plug into that little plastic box. I also have no idea what that little plastic box would be.

 

[J Knight]

I thought the second pic is the relay for the power locks. The wire colors look right for it too I think.

It could be, its part of the same harness.

 

[MadOgre]

I thought the second pic is the relay for the power locks. The wire colors look right for it too I think.

The first one has me confused. It looks like the wiper switch harness, but I have no idea why it would plug into that little plastic box. I also have no idea what that little plastic box would be.

Ya that sounds more like it actually

 

[Georgeb]

Any numbers on any of those parts?

 

[highdesertrange]

the 2nd pic is the power door locks. of course the one at the bottom of the steering column is the neutral safety/bu lights. the other I am not sure of maybe cruise control. highdesertranger

 

[Boone83K10]

Pic 1 is cruise control harness. Pic 2 is power door lock relay. Pic 3 is neutral safety switch.

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[nab407]

Thanks for the help guys!