Coolant Temperature Sender

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john keefe
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Re: Coolant Temperature Sender

Post by john keefe » Sat Jun 15, 2019 2:29 pm

Great! I figured you'd have a solution.

Brings up a question on an earlier (pg. 1?) quote that its not the same as the Bronco II sender. Just looking at RockAuto, looks like TS36 is the same (used for a variety of Fords since 1969 - 89). Not the same, or something special for Scorpios? Can pick up one locally.

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Re: Coolant Temperature Sender

Post by john keefe » Sat Jun 15, 2019 2:51 pm

brokencase wrote:
Sat Jun 15, 2019 2:10 pm
Always search ebay for keywords "Ford Scorpio" and then with "Merkur Scorpio"!
What would you guys do without me?

Don't be scared of the locations...the items will arrive.
That's how I find many parts, if Jeff Herson doesn't have something. If its on eBay, you're in pretty good company... if you're buying from some Joe in the UK running a Cosworth pick-and-pull or such, you don't know what you're gonna' get.

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Re: Coolant Temperature Sender

Post by brokencase » Sat Jun 15, 2019 5:24 pm

Forget the one from RockAuto or the Bronco. Scorpio is special and RockAuto is wrong.

The only problem with the stock sensor is that it will eventually fail again. So you might want to order two of them.
The reason they fail is because they sink a lot of current. The thermistor material inside the sensor eventually "cooks".

That is why there is the alternative solution discussed in this thread. The Arduino solution is also calibrated so you will know the actual temp.

john keefe
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Re: Coolant Temperature Sender

Post by john keefe » Sun Jul 14, 2019 12:17 am

Bought 2 from Latvia, cost about $19 including shipping. Took a couple weeks. Haven't had a chance to install, but they look well made.

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Re: Coolant Temperature Sender

Post by itking » Thu Jul 18, 2019 11:43 am

john keefe wrote:
Sun Jul 14, 2019 12:17 am
Bought 2 from Latvia, cost about $19 including shipping. Took a couple weeks. Haven't had a chance to install, but they look well made.
I got mine from Latvia also. I also had not had a chance to install.
Ron
1989 Merkur XR4Ti - Magenta [My XR]
1988 Merkur XR4Ti - Bunny [Wife's XR]
1988 Merkur XR4Ti - Raven [Daughter's XR]
1985 Merkur XR4Ti - Wombat [Youngest Son's XR]
1997 Dodge Ram 1500 4x4 5.9L - Betsy
2002 Buick Century Custom - Daily Driver
1968 Dodge Charger 383

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merkurdriver
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Re: Coolant Temperature Sender

Post by merkurdriver » Sun Jul 21, 2019 11:00 pm

brokencase wrote:
Sat Jun 15, 2019 5:24 pm
Forget the one from RockAuto or the Bronco. Scorpio is special and RockAuto is wrong.
( x 2 ) The Scorpio sender is unique and nothing else in the North American market matches it.

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Re: Coolant Temperature Sender

Post by merkurdriver » Sun Jul 21, 2019 11:04 pm

itking wrote:
Thu Jul 18, 2019 11:43 am
john keefe wrote:
Sun Jul 14, 2019 12:17 am
Bought 2 from Latvia, cost about $19 including shipping. Took a couple weeks. Haven't had a chance to install, but they look well made.
I got mine from Latvia also. I also had not had a chance to install.
Which ones (what color ring) did you guys get from Latvia? The color ring is relative to the temp range in European Ford land.
I've found the ones with the red ring to be pretty accurate for the NA Merkur Scorpio gauge cluster.
(Have them in stock here in the US for $9.95 + shipping)

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Re: Coolant Temperature Sender

Post by brokencase » Tue Jul 23, 2019 10:43 pm

The one I got from Latvia worked fine. 190F center of gauge. Don't recall any color.

It would not make sense if they made them in any variation. Think about it. You only want to see something like a standard 150-240F range on a coolant temperature gauge no matter what engine the car has in it.

Thus the only reason they might have different sensors is if the gauges in the cars were somehow different. I think that is unlikely, given that these are advertised to fit Scorpio.

Even if this style of sensor was used in various models of that era - it would be foolish for the manufacturer to make them with different responses from just a logistical standpoint.

It's like the ECT sensor that the EECIV uses, It would be chaos if the ECT's were different between models of that era.

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Re: Coolant Temperature Sender

Post by merkurdriver » Wed Jul 24, 2019 2:15 am

Yes, different color coded senders for the different gauge clusters. More era-specific than temp specific, but the "wrong" one will give an inaccurate reading.

Once Ford stopped calling it Granada Scorpio and it was just known as "Ford Scorpio" it had this cluster (and a different temp sender):

Image

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Re: Coolant Temperature Sender

Post by brokencase » Sat Jul 27, 2019 1:28 pm

I'm sorry, you haven't convinced me. I don't believe they are any different.
It would just be fool hardy for them to make various different temp gauges sensors in the same physical package with various responses for different models.

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Re: Coolant Temperature Sender

Post by Ed Lijewski » Sat Jul 27, 2019 5:49 pm

Newer model temp gauges may be designed differently by different companies. Newer model temp gauges may operate over different signal response horizons.

YMMV
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Re: Coolant Temperature Sender

Post by brokencase » Sun Jul 28, 2019 2:59 pm

May? Maybe...

How about something like "Hey - I have two kinds of brand new temp gauge sensors here right in front of me and I measured the resistances at different temps and you know what...they are different". Or "Hey look - I found a data sheet for the different types of gauge sensors and they say they are different." Or - "I see in the later Scorpio manual that they mention you have to use the PURPLE temp gauge sensors for the later cars"

But you can't say that can you? All you got is voodoo speculation. Give me some real data....and no, a picture of the later car dash doesn't cut it.

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Re: Coolant Temperature Sender

Post by merkurdriver » Thu Aug 01, 2019 2:33 am

Ford Scorpio Coolant Temp Senders (single pole senders for the gauge in the instrument cluster):

Ford of Europe factory part # - Color of the band on the sender
86VB10884BA - BLACK
86VB10884AA - BROWN
85AB10884AA - PURPLE
89FB10884AA - GREEN

Image

Image

Image

Image

I guess they could all read the same/ have the same resistance/ same temperature range.
But if they all read the same, why so many colored bands and different part numbers?

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Re: Coolant Temperature Sender

Post by john keefe » Thu Aug 01, 2019 12:47 pm

The two I ordered have green bands. Hoping to install one in the next couple days; I'll get back with comments on what it displays.

Seems likely there'd be a reason for the different colored bands, though it appears the bands may just represent manufacturer, or country of origin?

https://www.buycarparts.co.uk/ford/scor ... ure-sensor
They all have the same part number

My cross-reference for the green sender seems to be 89FB 10884 AA

My memory of US Ford parts numbers is the first represent years (e.g., E9 for '89), the last represents the vendor (e.g., AA or AB, BA and BB for four different manufacturers) and/or production location, and/or small revision of sorts. I presume its the same in UK, probably easier to understand as they start with the actual year.

The cross-reference I found for the brown-ringed one also included:

86VB 10884 AA
95GB 10884 AA
95VB 10884 BA

The "brown" one covered Scorpio variants from 1994-1998, and other Fords from 1985- 92, as well as Mazda's up to 2003

I might have another meter laying around to compare temps at a different point in the cooling system.

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Re: Coolant Temperature Sender

Post by brokencase » Thu Aug 01, 2019 11:52 pm

They are all the same. The different part numbers/colors reflect different production runs or different suppliers. Let's take another vehicle from the same era like the the '88 mustang as an example. This listing on Rock Auto indicates a multitude of Ford part numbers that cross to the same sensor.
https://www.rockauto.com/en/moreinfo.ph ... 9&jsn=1126

If you look at all the sensors they sell for the model in question you will see there is a green one, a red one, and a black one...etc... They all work the same.

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