Digital Coolant Gauge Sensor Part Number

[friskyfrankie]

Anyone have a Motorcraft part number for the coolant sensor that feeds a digital gauge for a 1995 Mercury Grand Marquis? I know there are TWO sensors, one right near the thermostat and the other on the intake on the passenger side. The digital cluster is not reading above one bar for the temp so I think we need the one on the passenger side?

[sly]

The one next to the thermostat (driver side) should be the one for the cluster. The one on the other side should be the ECT for the PCM.

I know the one for the analog clusters (one wire) is the same one for an early 80s bronco (had to replace the one on my 93. Not sure what the digital clusters use though. If it does use the same part, that should be SW2328. Resistance range is around 75 ohm cold and 10 ohm at operating temp. Everything I'm finding says the digital uses the same temp sender (or the sender for the digital cluster isn't available).

[friskyfrankie]

The one next to the thermostat (driver side) should be the one for the cluster. The one on the other side should be the ECT for the PCM.

I know the one for the analog clusters (one wire) is the same one for an early 80s bronco (had to replace the one on my 93. Not sure what the digital clusters use though. If it does use the same part, that should be SW2328. Resistance range is around 75 ohm cold and 10 ohm at operating temp. Everything I'm finding says the digital uses the same temp sender (or the sender for the digital cluster isn't available).

That's interesting as I thought the one, on the passenger side, was for the gauge and the one near the thermostat was for the ECM. I don't remember either one being a "one wire" connector - both being dual prong. Will have to take another peek. Probably best idea is to pull the one near the thermostat and see if luckily there is a Ford part number etched on it.

[friskyfrankie]

Still seems to be a lot of confusion on this. It has been stated, here, the sensor reporting to the digital cluster is the one on the driver's side while some manuals (and internet info) "seem" to indicate it is the one right behind the alternator, on the passenger side. Guess I need some info to "break the tie"!

[sly]

I've never seen a panther with the ECT on the driver side. In fact, later models that use the ECT for both the PCM and cluster only have the passenger side one.

[friskyfrankie]

I've never seen a panther with the ECT on the driver side. In fact, later models that use the ECT for both the PCM and cluster only have the passenger side one.

Perhaps I am being dense but which one would be the one for the digital cluster? Driver's side or passenger side?

[sly]

driver side should be for the cluster, no matter which cluster it is. The problem is which sensor should go there, the 1 wire or the 2 wire. I don't know if the digital cluster uses the same sensor as the analog cluster. That's the issue.

[WagonMan]

Can't you just disconnect the suspect sensor and see that the gauge reads nothing instead of one bar? WagonMan

[sly]

Should be able to do that. Should either read nothing if high resistance means cold or read hot if low resistance means cold.

[friskyfrankie]

Can't you just disconnect the suspect sensor and see that the gauge reads nothing instead of one bar? WagonMan

Now THERES something I didn't think of! Certainly worth a shot and will try to do so this week.

[friskyfrankie]

Should be able to do that. Should either read nothing if high resistance means cold or read hot if low resistance means cold.

Will consider this as well!

[friskyfrankie]

Got a chance to give it a quick look today and guess what sports fans - I removed the connector, from each of the two sensors and even had them out at the same time. There was NO difference - the digital gauge STILL read one bar only. This one has me stumped so unless we can come up with a fix, my friend may have to live with it although it is not an optimum situation!

[sly]

That means there is a wire break somewhere between the sensor and the cluster. That wire from the left sensor (driver side) should be direct to the cluster.

Just to make sure, try shorting the driver side one to the engine or something well grounded. If you still don't get a response from the cluster, then yeah... broken wire or bad connector somewhere along the way. I think this wire does go through the massive connectors below the brake master.

[WagonMan]

Does the gauge ALWAYS read one bar, whether the engine is hot or cold? WagonMan

[friskyfrankie]

Does the gauge ALWAYS read one bar, whether the engine is hot or cold? WagonMan

Yes!