 1973 2L cyl. head sensor, wiring ? |
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| kwtruck |
 Feb 15 2010, 02:14 PM
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#1
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Newbie  Group: Members Posts: 14 Joined: 27-January 10 From: cropwell, al. Member No.: 11,294 Region Association: None  |
cyl. head temp sensor has 2 terminals. single wire coming out of harness. can it be altered or do I need new sensor ?
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Replies(1 - 11)
| Sleepin |
Feb 15 2010, 02:29 PM
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#2
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Advanced Member Group: Members Posts: 3,647 Joined: 20-November 07 From: Grand Junction, Co. Member No.: 8,357 Region Association: Rocky Mountains |
It may be a dual sending unit. I am not sure though. If it is, you should be fine just plugging into one terminal.
Someone correct me if I sound like an idiot.... (IMG:style_emoticons/default/biggrin.gif) |
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| Cap'n Krusty |
Feb 15 2010, 02:51 PM
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#3
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
T Sensor 2 has a single wire, as does the pigtail from the harness. T Sensor 1 (on the intake manifold) has 2 pins, and so does the plug in the harness. They're about 2 feet apart, so it's unlikely they can be mixed up. Pictures would help.
The Cap'n |
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| detoxcowboy |
Feb 15 2010, 03:02 PM
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#4
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Senior Member Group: Members Posts: 1,294 Joined: 30-January 08 Member No.: 8,642 Region Association: Africa |
QUOTE(kwtruck @ Feb 15 2010, 12:14 PM)  cyl. head temp sensor has 2 terminals. single wire coming out of harness. can it be altered or do I need new sensor ? pics? do you mean oem sender for the fi system or aftermarket sensor for a gauge? for a gauge sender there are 2 wires, for the oem sensor there is one wire.. |
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| type47 |
Feb 15 2010, 05:03 PM
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#5
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
QUOTE(detoxcowboy @ Feb 15 2010, 01:02 PM) QUOTE(kwtruck @ Feb 15 2010, 12:14 PM) cyl. head temp sensor has 2 terminals. single wire coming out of harness. can it be altered or do I need new sensor ? pics? do you mean oem sender for the fi system or aftermarket sensor for a gauge? for a gauge sender there are 2 wires, for the oem sensor there is one wire.. (IMG:style_emoticons/default/agree.gif) I can't tell if you're talking about the sensor that goes under the spark plug for the CHT gauge or the sensor that screws into the head for the ECU. |
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| kwtruck |
Feb 15 2010, 06:26 PM
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#6
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Newbie Group: Members Posts: 14 Joined: 27-January 10 From: cropwell, al. Member No.: 11,294 Region Association: None |
refering to sensor that screws into head for ecu.
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| underthetire |
Feb 15 2010, 06:32 PM
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#7
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
Should be single wire with a in-line resistor.
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| kwtruck |
Feb 15 2010, 08:19 PM
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#8
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Newbie Group: Members Posts: 14 Joined: 27-January 10 From: cropwell, al. Member No.: 11,294 Region Association: None |
has vdo quartz temp gauge on center console. will try to trace wiring from it tomorrow but I know we dont have a resister pigtail if its required on two terminal hookup.
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| underthetire |
Feb 15 2010, 08:22 PM
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#9
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
QUOTE(kwtruck @ Feb 15 2010, 06:19 PM) has vdo quartz temp gauge on center console. will try to trace wiring from it tomorrow but I know we dont have a resister pigtail if its required on two terminal hookup. There is no 2 wire sensors for the ECU head temp. The two wire is for a vdo gauge only. Won't work with a ECU. |
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| kwtruck |
Feb 15 2010, 09:03 PM
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#10
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Newbie Group: Members Posts: 14 Joined: 27-January 10 From: cropwell, al. Member No.: 11,294 Region Association: None |
should I forget the gauge and order the sensor for hookup to the ecu ?
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| underthetire |
Feb 15 2010, 09:24 PM
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#11
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
the only real way to use the gauge is with the thermocouple ring under the spark plug unless both your heads are tapped for the 2wire. The stock one goes in behind the rear intake tube on the passenger side. You will need it for the stock fi to work, as well as the resistor. Check http://members.rennlist.com/pbanders/ for part numbers and resistor values. The resistor can be had at radio shack.
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| type47 |
Feb 16 2010, 09:52 AM
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#12
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
QUOTE(kwtruck @ Feb 15 2010, 06:19 PM) has vdo quartz temp gauge on center console. factory set up for the temp gauge in the console is that it is an oil temp gauge not a head temp gauge. The oil temp gauge is connected to a sensor in the oil sump/bottom of the engine and is commonly called a taco plate sender (mentioned for searching purposes). The VDO head temp gauge is aftermarket (so no wiring is present in a stock harness) and is a 2 wire item (so you have to run it) with a sensor located under the #3 spark plug (preferred location) |
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