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Old 09-02-2012, 08:51 PM   #1
OSM 70 C20
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What is this wire...

The green wire is bound together with the yellow one going to the coil... where is it supposed to go? Please help
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Old 09-02-2012, 08:57 PM   #2
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Re: What is this wire...

Temperature sending unit, usually installed near the front of the left head.
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Old 09-02-2012, 09:05 PM   #3
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Re: What is this wire...

THANKS!!!!!!!!!!!!!!! That was fast
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Old 09-02-2012, 09:09 PM   #4
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Re: What is this wire...

hmmmmmmmmmmm....
I think someone install something wrong
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Old 09-02-2012, 09:10 PM   #5
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Re: What is this wire...

I would be thinking tach wire since it goes to the coil
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Old 09-02-2012, 09:12 PM   #6
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Re: What is this wire...

It looks similar to the horn wire.... but if it's run together with the coil wire, that's not it.
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Old 09-02-2012, 09:15 PM   #7
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Re: What is this wire...

Quote:
Originally Posted by OSM 70 C20 View Post
hmmmmmmmmmmm....
I think someone install something wrong
It looks like there is sender there, but it doesn't look like the correct one.
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Old 09-02-2012, 09:16 PM   #8
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Re: What is this wire...

no tach on my dash, not that makes a difference. On the wiring harness it is with that coil wire. That 2 prong sender has me worried. It is similar to the horn wire, but i think the horn wire is heavier gauge.
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Old 09-02-2012, 09:18 PM   #9
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Re: What is this wire...

Oh, what do you think of the PO's breathers? 1 on each side
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Old 09-02-2012, 09:29 PM   #10
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Re: What is this wire...

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Oh, what do you think of the PO's breathers? 1 on each side
They look more like "drippers" LOL.

If it is a green wire, in the engine harness with that loom and that connector, it goes here:





It looks like you have the wrong sender in that head, it should look more like this:
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Old 09-02-2012, 09:35 PM   #11
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Re: What is this wire...

Sweet! Thanks!!!
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Old 09-02-2012, 09:36 PM   #12
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Re: What is this wire...

I hooked mine up today since it hasn't been hooked up since I got the truck and my temp gauge pegged out on the hot side. Plus someone in the past moved my temp sonsor from the front of the left head to the rear of the right head. Maybe I will just replace the sensor unless anyone has any other ideas.
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Old 09-02-2012, 09:39 PM   #13
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Re: What is this wire...

the horn wire is also green, but comes off the headlight harness
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Old 09-02-2012, 09:43 PM   #14
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Re: What is this wire...

Quote:
Originally Posted by sjarrett71 View Post
I hooked mine up today since it hasn't been hooked up since I got the truck and my temp gauge pegged out on the hot side. Plus someone in the past moved my temp sonsor from the front of the left head to the rear of the right head. Maybe I will just replace the sensor unless anyone has any other ideas.
Sounds like someone inadvertently swapped the heads after a valve job or something. Replace the sender, but make sure you get one for a gauge rather than for a warning light. Gauge senders have variable resistance based on temperature. Warning light senders are either "off" or "on".
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Old 09-02-2012, 10:49 PM   #15
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Re: What is this wire...

Quote:
Originally Posted by sjarrett71 View Post
I hooked mine up today since it hasn't been hooked up since I got the truck and my temp gauge pegged out on the hot side. Plus someone in the past moved my temp sonsor from the front of the left head to the rear of the right head. Maybe I will just replace the sensor unless anyone has any other ideas.
The sender asnt moved more than
Likely the heads were removed and not put back on the same sides as they were.
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Old 09-02-2012, 11:01 PM   #16
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Re: What is this wire...

I believe 73 up had the sensor in the rear of the right head
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