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Old 05-28-2009 | 01:12 PM
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Default HP 500 engine harness

I'm putting together an HP 500 for a friend. I just need to know what color wire goes to
1: oil sender
2: oil temp
3: water temp
4: water pressure

or is there somewhere online I can get this information from?

Thanks.
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Old 05-28-2009 | 02:00 PM
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This is out of a manual for 1999 HP 500, hope this helps.
Attached Thumbnails HP 500 engine harness-scan0001-large-.jpg  

Last edited by harsin; 05-28-2009 at 02:05 PM.
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Old 05-28-2009 | 02:11 PM
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Many thanks, but can you scan this pic at a higher resolution?
I can't make out the writing when I zoom in.

Thanks again

Marcelo
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Old 05-28-2009 | 02:22 PM
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Oil pressure sender LIT/BLU
Oil Temp BRN/WHITE
Water temp TAN
Water pressure can't find

This is what the manual shows. I can Email the copy if you want.

Morry
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Old 05-28-2009 | 02:26 PM
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I dont believe water pressure will have a wire?? Will it?? Maybe I am just stuck on outboards
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Old 05-28-2009 | 02:31 PM
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Thanks again Morry.
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Old 05-28-2009 | 04:32 PM
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It's a simple diagram but here you go. It for the stock TB IV Ignition set up.

I have the MPI as well if you need that?

Here you go: (Hope this helps)
Attached Thumbnails HP 500 engine harness-454-502-tbiv-carb-wiring.jpg  
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Old 05-29-2009 | 06:36 AM
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My water pressure gauge is mechanical. I have tubing running from the engine to the gauge. No wire.

Ken
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Old 05-29-2009 | 06:55 AM
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In that case, your water temp is easy! It's the Tube!!!

(Kidding)

If your mech water gauge has power (backlight) then the purple wire (12v switched) is used to branch across all the gauges to provide power.
Lit Blu = Oil
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