Original motor question

[Steve-R0828]

And before you stated about educating myself on the relays check the whole thread you have just repeated what I have already said

 

[fleming442]

https://www.amazon.com/dp/B07KTP5JTS/?tag=gbody-20

 

[Steve-R0828]

Now that's a thing of beauty thank you fleming

 

[fleming442]

No problem, Hoss; just trying to help. Sorry if I was a bit harsh, but it's difficult to establish someone's aptitude over the internet sometimes (especially with automotive electrical "voodoo"). 😀

 

[Steve-R0828]

I was just trying to splice some wires together so I could get some readings off the gauges to do a bit of work I do plan on getting some aftermarket gauges or a led dash cluster

 

[Steve-R0828]

OK so here's an update I found 4 of my 5 fuel relay wires the last one is a red wire marked prime conn do I just substitute that for a 12v source? Here is the diagfam

 

[Rktpwrd]

 

[fleming442]

I need to see more of that diagram to make that call.

 

[Steve-R0828]

That it

 

[fleming442]

OK, here's my take on it: the TBI 4.3 that ran off the ECM didn't have gauges- just idiot lights. So, if it were my project, I would wire in a dedicated fuel pump relay and oil send wire.
The only factory wire I would use would be the tan/white to the fuel pump. Get an aftermarket oil pressure safety switch like this: https://www.summitracing.com/parts/crt-a68301 Wire 85 & 86 to the safety switch and ground, and grab a 12ga. tap off the pink ignition circuit for the feed side of the switch in the relay.
Check the part number on the oil sender; it may be for an idiot light, not a gauge. Run a separate tan to the gauge cluster as the factory one is tied to the ECM and fuel pump.