Alright, I got a 89 RS that had a 305 TBI, I went to a 350 TBI, now going to Speed Density TPI. I got the Painless Wire Harness for 90-92 TPI. Few dumb questions.

Oil Pressure Sender....There are two connectors, One from my old harness going from the driver's side dash (I am assuming for the gauge.) One from my new harness. The guy from Painless told me my Oil Pressure Sender has to be hooked up or my Fuel Pump wont turn on. Anyway, I want everything to work as intended, so would I be able to splice both connectors together and be fine? Or should I run two senders?

Second, somewhere, somehow, my Coolant Fan Switch Wire got cut, or went AWOL. The single wire that goes to the switch itself. (Passenger Side Cylinder head.) Where is the orgin of this wire and what color is it? Also, where exactly is the Fan Relay?

Last one, there is a pressure switch on a Power Steering line that has a plug. (Drivers side, by PS pump.) That one also got cut. I found the one wire, which was Black with a White tracer. Turned out to be a ground. The other wire is a Green wire with a orange tracer (or something similar.) Where is the orgins of that wire and what the hell is that switch?

TIA.

 

89 originaly had only one sender unlike the earlier cars. You should be perfectly fine splicing that into one connector for the sending unit near the fuel filter. I spliced some wires in my 87 to use only one sender. If i recall corectly the wire for the gauge goes in the center of the three wire connector.

The coolant fan switch wires origin is the computer harness. I'm unsure of the wire color though. Also my fan relays are right next to my battery.

 

I figured 90-92 had the electronic dash, so it probably got its feed from the computer, but mine is mostly manual.

I dont see a fan relay close to my battery.

For the hell of it, which side is your battery on? Mine is passengers.

 

As far as i know the only thing that changed in the 90-92 dash is the speedo going to electric. My battery is on the passagners side as well. The relays were originally mounted on the radiator support on my car but i replaced them and broke the little push pins in the process.

 

The only location that I can imagine there being the relays is on the driver's side firewall. None on the radiator support for me.