temp gauge Options

[forrestkhaag]

I recently went thru this issue with my newly reworked early temp gauge. After installing the incorrect sender (200) - then the correct one / Bruce Stone confirmed that the correct sender was the 150 degree version, I realized that my engine was simply not running hot enough to push the gauge past 1/8" off of the cold start position.... even after a good hour of freeway speeds.

Then, going back to the beach from bstone's treasure trove of goodies, I got stuck in a Riverside traffic jamb mid day and sat idling for about a half hour..... The gauge woke up and tweaked over to the middle range of the scale...... case solved. (IMG:style_emoticons/default/piratenanner.gif)

[arsprod]

I recently went thru this issue with my newly reworked early temp gauge. After installing the incorrect sender (200) - then the correct one / Bruce Stone confirmed that the correct sender was the 150 degree version, I realized that my engine was simply not running hot enough to push the gauge past 1/8" off of the cold start position.... even after a good hour of freeway speeds.

Then, going back to the beach from bstone's treasure trove of goodies, I got stuck in a Riverside traffic jamb mid day and sat idling for about a half hour..... The gauge woke up and tweaked over to the middle range of the scale...... case solved. (IMG:style_emoticons/default/piratenanner.gif)

Now that would be brilliant! I'm seriously thinking about getting a dipstick gauge - call me paranoid

[arsprod]

Back at this - I've ordered a sender finally but pulled the gauge out to check it (and it's fine). I noticed the gauge has 3 tabs marked +, GND, and an up arrow with lines. The schematic only shows 2 connections and I'm assuming one needs to be the up arrow one. Does the other lead go to + or GND?

[stugray]

+ to +12VDC (dash power)
GND to chassis ground

The third wire would lead to the temp sensor.
To test the gauge, with ignition on disconnect the wire from the temp sensor and ground it to the engine bar.
The gauge should read the Highest temp it is capable of.
This case represents the Hot case where the temp sensor resistance drops and approaches zero Ohms (short) at the sensor's highest rated temp.

The VDO unit that can be purchased through PP has the following cal curve.
From VDO:
125F (51C) = 340 ohms
160F (71C) = 135 ohms
300F (146C) = 20 ohms

This unit reads 1211 Ohms at ~20degC (68F)

[arsprod]

+ to +12VDC (dash power)
GND to chassis ground

The third wire would lead to the temp sensor.
To test the gauge, with ignition on disconnect the wire from the temp sensor and ground it to the engine bar.
The gauge should read the Highest temp it is capable of.
This case represents the Hot case where the temp sensor resistance drops and approaches zero Ohms (short) at the sensor's highest rated temp.

The VDO unit that can be purchased through PP has the following cal curve.
From VDO:
125F (51C) = 340 ohms
160F (71C) = 135 ohms
300F (146C) = 20 ohms

This unit reads 1211 Ohms at ~20degC (68F)

Thank you - appears mine is missing a lead to ground

[stugray]

Thank you - appears mine is missing a lead to ground

It might work fine that way though.
So there is a chance grounding the gauge "can" might not help.

[arsprod]

Thank you - appears mine is missing a lead to ground

It might work fine that way though.
So there is a chance grounding the gauge "can" might not help.

Discovered that - adding ground pegs the needle

[arsprod]

Follow up with some potentially helpful info for future readers - I got my temp gauge working (yay). The VDO sender I referenced earlier does work and Pelican stocks them, part #323055-M82. Another discovery - there's a bundle of connectors below the stickshift, underneath the heater indicator and carpet. I wished someone would have mentioned that earlier - the wire from the sender to my gauge was disconnected for some unknown reason. I discovered this after I'd already replaced the sender... oh well!

[stugray]

- the wire from the sender to my gauge was disconnected for some unknown reason. I discovered this after I'd already replaced the sender... oh well!

To test the gauge, with ignition on disconnect the wire from the temp sensor and ground it to the engine bar.
The gauge should read the Highest temp it is capable of.

Glad you got it working!

[arsprod]

- the wire from the sender to my gauge was disconnected for some unknown reason. I discovered this after I'd already replaced the sender... oh well!

To test the gauge, with ignition on disconnect the wire from the temp sensor and ground it to the engine bar.
The gauge should read the Highest temp it is capable of.

Glad you got it working!

Thanks, me too! Just noticed your signature - I was going to name mine Marvin too (after my dad).

[stugray]

Thanks, me too! Just noticed your signature - I was going to name mine Marvin too (after my dad).

I named mine Marvin because it is green, and my favorite Looney Tunes char was Marvin the martian.
And the mascot for a number of my missions has been Marvin:

(IMG:http://www.914world.com/bbs2/uploads_offsite/upload.wikimedia.org-10819-1435010694.1.jpg)

Stu

[arsprod]

Thanks, me too! Just noticed your signature - I was going to name mine Marvin too (after my dad).

I named mine Marvin because it is green, and my favorite Looney Tunes char was Marvin the martian.
And the mascot for a number of my missions has been Marvin:

(IMG:http://www.914world.com/bbs2/uploads_offsite/upload.wikimedia.org-10819-1435010694.1.jpg)

Stu

Well, mine's green as well and the car was owned by my dad's best friend. But you win - I have nothing to compare to Mars rover mission!