Mystery Plugs

[ASmith94]

after about a year and a half, I'm finally finishing up the 4.0 swap into my fathers 86 Comanche. Being my first engine swap, it never occurred to me to label any of the electrical connectors as I took them all off. I found a home for most of them but I'm a little lost on four of them. Any help identifying them would be greatly appreciated. The first two are located near the battery. I think the large one might be a factory fog light connector. The third one is on the other side of the engine bay near the computer. That one possibly might be a diagnostic port. The last one is on the back firewall near the intake manifold. No clue on that one. Any help would be appreciated.

[Ωhm]

If this is a relay block, its for the cooling fan. Relay is missing.

[ASmith94]

Thanks Ωhm!!! That helps allot. Do you know if it was tied down to something or just floating around with a relay on it?

[hakukamana]

That looks like an ODBI diagnostic connector. The electric fan relay is on the header clip LH side of the radiator. It usually has a plastic holder for the connector and the relay plugs into it.

[hakukamana]

Was your swap a 4.0 HO? or a non Renix computer swap? If so the harness is going to be ODB I so things may not line up exactly.

[Ωhm]

Yea, need a end view picture showing the pin cavities.

[HOrnbrod]

13 minutes ago, hakukamana said:

That looks like an ODBI diagnostic connector.

 

Definitely an OBD1 connector.

[Ωhm]

1 hour ago, ASmith94 said:

The third one is on the other side of the engine bay near the computer. That one possibly might be a diagnostic port.

You guys nailed it.

[ASmith94]

Thanks guys! That's one off the list of things I have to worry about haha The engine came out of a 96 cherokee 4.0 sport. It came from someones field half complete for 350$.

[ASmith94]

Doing some more searching, I came across that last sensor. That is the temp sensor that goes to your gauges, not the computer, correct? 

[Minuit]

Yes, the one for the ECU is up front in the thermostat housing.

[Eagle]

On 8/2/2018 at 9:36 AM, ASmith94 said:

Thanks guys! That's one off the list of things I have to worry about haha The engine came out of a 96 cherokee 4.0 sport. It came from someones field half complete for 350$.

 

Are you sure it was a '96? 1996 was the year the Cherokee first came with OBD2, which used a standard OBD2 'D' connector under the dashboard. 1995 was still OBD1.

[Minuit]

That looks like a 92-95 harness. OBD1 diagnostic connector and the later model temp sender plugs give it away.