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Re: Resistance specs on coolant temp senders?
[Re: moparx]
#3052786
06/23/22 06:56 PM
06/23/22 06:56 PM
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Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
Guitar Jones
OP
Paddle faster! I hear banjo music!
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OP
Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
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out of curiosity, is the bulb portion of the sender that goes into the coolant flow shiny brass color, or is it discolored to a greenish tint ?  Old one, the 244 unit is discolored, the 196 unit is brand new and shiny.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Resistance specs on coolant temp senders?
[Re: NITROUSN]
#3052805
06/23/22 08:16 PM
06/23/22 08:16 PM
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Joined: Jan 2003
Posts: 10,694
North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,694
North Dakota
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The C-3826 may be old but it was used for decades as long as the thermal gauges were in use. Based on my 78-81 truck parts book from Mymopar, as late as '78 the IVR was PN 3592899 which superseded PN 2258413 which is the IVR for the thermal gauges that C-3826 was used to test since the early '60's. Bottom line, I think the C-3826 tool is still the tool to use on your '74 and the 244 ohm sender you have is not the stock sender for a '74 Mopar. The values from the '93 FSM are not applicable as Mopar had stopped using thermal gauges by then. He said he is running the 93 cluster and wiring. Magnums had two temperature sensors one for the gauge and one for the computer. Ah Ha!! I missed that. Well, if he is running the '93 instrument cluster and wiring, I can see where there just may be a problem. Without looking at the '93 circuitry my first thought would be that you'd have to run all '93 sensors in the '74. But that's just a guess.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Resistance specs on coolant temp senders?
[Re: NITROUSN]
#3052814
06/23/22 08:45 PM
06/23/22 08:45 PM
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Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
Guitar Jones
OP
Paddle faster! I hear banjo music!
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OP
Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
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Looks like the TS271 Would be what you need. Time to move the fuel line. Looks like what I will have to do. I have one on order should be here Saturday if the road is passable.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Resistance specs on coolant temp senders?
[Re: 6PakBee]
#3052818
06/23/22 09:03 PM
06/23/22 09:03 PM
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Joined: May 2019
Posts: 6,212
nowhere
Sniper
master
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master
Joined: May 2019
Posts: 6,212
nowhere
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The C-3826 may be old but it was used for decades as long as the thermal gauges were in use. Based on my 78-81 truck parts book from Mymopar, as late as '78 the IVR was PN 3592899 which superseded PN 2258413 which is the IVR for the thermal gauges that C-3826 was used to test since the early '60's. Bottom line, I think the C-3826 tool is still the tool to use on your '74 and the 244 ohm sender you have is not the stock sender for a '74 Mopar. The values from the '93 FSM are not applicable as Mopar had stopped using thermal gauges by then. He said he is running the 93 cluster and wiring. Magnums had two temperature sensors one for the gauge and one for the computer. Ah Ha!! I missed that. Well, if he is running the '93 instrument cluster and wiring, I can see where there just may be a problem. Without looking at the '93 circuitry my first thought would be that you'd have to run all '93 sensors in the '74. But that's just a guess. I missed that too, lol. Need new glasses or something
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Re: Resistance specs on coolant temp senders?
[Re: Guitar Jones]
#3052913
06/24/22 10:48 AM
06/24/22 10:48 AM
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Joined: Sep 2003
Posts: 19,305
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,305
north of coder
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out of curiosity, is the bulb portion of the sender that goes into the coolant flow shiny brass color, or is it discolored to a greenish tint ? Old one, the 244 unit is discolored, the 196 unit is brand new and shiny. shine up the 244 ohm unit and see what it reads then. wondering how much, if any, the discoloration affects the reading.
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Re: Resistance specs on coolant temp senders?
[Re: moparx]
#3053051
06/24/22 03:55 PM
06/24/22 03:55 PM
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Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
Guitar Jones
OP
Paddle faster! I hear banjo music!
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OP
Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,622
in a cattle trailer down by th...
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I got the 93 spec sender today, checked it and it read 2K ohms, hmm, ok. Installed it, filled with coolant and it looks to be good. Gauge came up pretty quick and read in the normal zone after it got to operating temp. So I'm done futzing with it, I've done more electrical getting everything working on this truck than ever wanted to do in my life  If I would have stuck to the original plan of installing the complete fuel injected engine and fuel tank I would probably be done with it already.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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