Need engine sensor help!

[SCOTI]

Ok, I'm trying to finish up the motor rebuild in my 89 CC dually. It's the original tbi 454 that was refreshed but after it went through the rebuild process, I only got some of the sensors back w/the 'extra' parts.

My problem is there were many underhood wires in a seriously bad state of condition. 2 of the 3 coolant sensors (1 in each head + 1 @ the front of the intake) were really cooked. One was missing the terminal @ the end (driver side sensor), the other (pass side head) has barely 2 strands of wire retaining it.

I've got the technical GM ID info from an 89 service manual & the 3 coolant sensors I've been struggling with are:

1) Auxiliary Cooling Fan Switch (this one is ID'd as the one in the pass side head).
2) Coolant Temp Sensor (this one is ID'd as the one @ the front of the intake).
3) Water Temperature Switch (this one is ID'd as the driver side sensor).

When I hit my local parts places, their search features come up w/the one for the intake & a generic temp unit for the head (Oreillys didn't even list one for the head). They keep telling me to get the same temp unit for the head & just use 1 in each head. My issue w/that is they're ID'd as 2 different items. 2 different items would suggest 2 different functions. To me, 2 different functions usually aren't monitored w/a similar sensor.

Anyone have some possible specific p/n's or specific data sources they can share?

[Desert1957]

I can tell you how my RV is, 1994 P30 chassis with a 7.4 TBI engine.


1) Auxiliary Cooling Fan Switch (this one is ID'd as the one in the pass side head).This sensor turns my electric fans on at a specific temp

2) Coolant Temp Sensor (this one is ID'd as the one @ the front of the intake).This sensor is the input signal to the ECM

3) Water Temperature Switch (this one is ID'd as the driver side sensor).This sensor is the sending unit for the dash gauge

Sensors in the heads were available at Advanced Auto parts last year. when I did my manifold gaskets.

Desert

[SCOTI]

Originally Posted by Desert1957

I can tell you how my RV is, 1994 P30 chassis with a 7.4 TBI engine.


1) Auxiliary Cooling Fan Switch (this one is ID'd as the one in the pass side head).This sensor turns my electric fans on at a specific temp

2) Coolant Temp Sensor (this one is ID'd as the one @ the front of the intake).This sensor is the input signal to the ECM

3) Water Temperature Switch (this one is ID'd as the driver side sensor).This sensor is the sending unit for the dash gauge

Sensors in the heads were available at Advanced Auto parts last year. when I did my manifold gaskets.

Desert

Did you search for the parts using their web site or was it an in store visit? I just checked their site & it's very similar to the NAPA site I looked @ earlier. Lots of generic cooling system parts but not specific enough to list temp sensors.

[rfmaster]

1) OE 14080661 (Napa FS106) Coolant fan switch
2) AC Delco 213-4396 (19187357 ) CTS for ECM
3) OE 25037345 (with gauge) Temperature sending unit

[Desert1957]

Originally Posted by rfmaster

1) OE 14080661 (Napa FS106) Coolant fan switch
2) AC Delco 213-4396 (19187357 ) CTS for ECM
3) OE 25037345 (with gauge) Temperature sending unit

Hey , thanks you beat me too it.

Scoti, I just walked in to my Local store. Lucky for me my particular guy is way to good a parts man for my Mom & Pop store.

He has never let me down.

Desert

[SCOTI]

Thanks for the help guys! We don't have any Advanced stores around me so I thought I could identify what I needed on-line. No luck there.

I'll search my local parts houses for these.