Ambient Temperature gauge - Wiring

PEGE63 · Apr 11th, 2006, 18:20

Hola,
Bought an amb.temp.gauge from Geoge H some 1.5yrs ago and it got stuck in the garage and I thought I'd do something about fitting it last w-end.
The Gauge is a proper 940 Volvo made 1990, it does fit the dash (bottom left) but wiring connectors are different as mine is a 1997 car so can anyone come up with any suggestions as how to wiore it up ?
From the unit I have 2 greens for the sensor and 4 other wires:
orange - brown/black - yellow/white - black.
I have played with it a bit and can get the bulb in the unit to light up if I hook up black to +(pos) and orange to - (neg) only problem is that I get no reading on the display - any ideas ???. From memory 2 wires were for the 'dimming function' and the others for power. I have tried various permittations and am stuck. Wires to sensor appears to be OK, maybe the unit is faulty....

RollingThunder · Apr 11th, 2006, 18:28

I'm at work at the moment so can't check, but the general wiring convention is that black is earth. The bulb will illuminate if you get the connections back to front, but few electronic components will operate that way. I wouldn't discard the gauge just yet

PEGE63 · Apr 11th, 2006, 21:52

Quote:

Originally Posted by RollingThunder

I'm at work at the moment so can't check, but the general wiring convention is that black is earth. The bulb will illuminate if you get the connections back to front, but few electronic components will operate that way. I wouldn't discard the gauge just yet

OK, thanks for that.

Peter Milnes · Apr 12th, 2006, 01:07

Send me your e-mail address so that I can attach the wiring diagram for the Outside Air Temperature gauge. The club only allows about 350k attachments and this is about 700k. Use my address as on page 40 of the "Driver".

All the best, Peter.

migrator · Apr 12th, 2006, 01:17

Hello Selkirk, Cockburnspath calling.

"From the unit I have 2 greens for the sensor and 4 other wires:
orange - brown/black - yellow/white - black."

For what it is worth, here is my penny-worth.

The two green cables run to the sensor unit.

Orange runs to the fuse (?8)

Black runs to earth

Yellow/white runs to the rheostat for the instrument lights
Brown/black runs to earth
(These last two may be reversed - I do not have a wiring diagram for this).

My wiring diagram for the V90 shows a brown/black running to the rheostat and a blue running to earth (the others are the same).

I hope this is a bit of a help rather than a confusion.

Peter Milnes · Apr 12th, 2006, 01:31

The 940 is a little different in it's wiring Ian. I have done a copy of it for him from my 1996 940 wiring book and am waiting for his e-mail addy to send it to him. Club is limited as to size of attachments which, as my copy is about twice the limit means it has to be sent direct.

Thanks for your ever helpfulness Ian and all the best, Peter.

PEGE63 · Apr 12th, 2006, 13:09

Thanks to all of you sofar

-Peter. I sent you a 'private message', hope that will be OK.

PEGE63 · Apr 13th, 2006, 17:35

Peter,
Many thanks for the drawings.
It only took 5 min's to go over it and I then had the thing up an running showing the temp.
Great stuff, all I have to do now is fitting it, should not be any major problems (I hope...) Again many thanks to you all.

Apr 11th, 2006, 18:20	#1
PEGE63 Master Member Last Online: Mar 18th, 2023 11:23 Join Date: Dec 2002 Location: Stenungsund	Ambient Temperature gauge - Wiring Hola, Bought an amb.temp.gauge from Geoge H some 1.5yrs ago and it got stuck in the garage and I thought I'd do something about fitting it last w-end. The Gauge is a proper 940 Volvo made 1990, it does fit the dash (bottom left) but wiring connectors are different as mine is a 1997 car so can anyone come up with any suggestions as how to wiore it up ? From the unit I have 2 greens for the sensor and 4 other wires: orange - brown/black - yellow/white - black. I have played with it a bit and can get the bulb in the unit to light up if I hook up black to +(pos) and orange to - (neg) only problem is that I get no reading on the display - any ideas ???. From memory 2 wires were for the 'dimming function' and the others for power. I have tried various permittations and am stuck. Wires to sensor appears to be OK, maybe the unit is faulty.... __________________ Peter V70 D5 (185) SE Sport, Geartronic, 58 MY08 4C. 133k (before Avensis 55 95K, P97 945 LPT 2.3FK 113K and J92 945 2.0T 165K)

Apr 11th, 2006, 18:28	#2
RollingThunder Grumpy Old Git Last Online: Apr 19th, 2024 09:16 Join Date: Dec 2004 Location: South Yorkshire View Photos By: RollingThunder	I'm at work at the moment so can't check, but the general wiring convention is that black is earth. The bulb will illuminate if you get the connections back to front, but few electronic components will operate that way. I wouldn't discard the gauge just yet __________________ S40 2.4i '07 Japanese import '96 850R - https://www.volvoforums.org.uk/showthread.php?t=312484 Ex Danish Embassy '96 940 GLE LPT - https://www.volvoforums.org.uk/showthread.php?t=326071

Apr 12th, 2006, 01:17	#5
migrator Aye - him again Last Online: Yesterday 14:25 Join Date: May 2001 Location: HAWICK	Hello Selkirk, Cockburnspath calling. "From the unit I have 2 greens for the sensor and 4 other wires: orange - brown/black - yellow/white - black." For what it is worth, here is my penny-worth. The two green cables run to the sensor unit. Orange runs to the fuse (?8) Black runs to earth Yellow/white runs to the rheostat for the instrument lights Brown/black runs to earth (These last two may be reversed - I do not have a wiring diagram for this). My wiring diagram for the V90 shows a brown/black running to the rheostat and a blue running to earth (the others are the same). I hope this is a bit of a help rather than a confusion. __________________ (Ouch - that's another knuckle ...) VOC 11817

Apr 12th, 2006, 13:09	#7
PEGE63 Master Member Last Online: Mar 18th, 2023 11:23 Join Date: Dec 2002 Location: Stenungsund	Thanks to all of you sofar -Peter. I sent you a 'private message', hope that will be OK. __________________ Peter V70 D5 (185) SE Sport, Geartronic, 58 MY08 4C. 133k (before Avensis 55 95K, P97 945 LPT 2.3FK 113K and J92 945 2.0T 165K)

Apr 13th, 2006, 17:35	#8
PEGE63 Master Member Last Online: Mar 18th, 2023 11:23 Join Date: Dec 2002 Location: Stenungsund	Peter, Many thanks for the drawings. It only took 5 min's to go over it and I then had the thing up an running showing the temp. Great stuff, all I have to do now is fitting it, should not be any major problems (I hope...) Again many thanks to you all. __________________ Peter V70 D5 (185) SE Sport, Geartronic, 58 MY08 4C. 133k (before Avensis 55 95K, P97 945 LPT 2.3FK 113K and J92 945 2.0T 165K)

Apr 12th, 2006, 01:07	#4
Peter Milnes Premier Member Last Online: Apr 10th, 2014 00:01 Join Date: Feb 2002 Location: Tonyrefail	Send me your e-mail address so that I can attach the wiring diagram for the Outside Air Temperature gauge. The club only allows about 350k attachments and this is about 700k. Use my address as on page 40 of the "Driver". All the best, Peter.

Apr 12th, 2006, 01:31	#6
Peter Milnes Premier Member Last Online: Apr 10th, 2014 00:01 Join Date: Feb 2002 Location: Tonyrefail	The 940 is a little different in it's wiring Ian. I have done a copy of it for him from my 1996 940 wiring book and am waiting for his e-mail addy to send it to him. Club is limited as to size of attachments which, as my copy is about twice the limit means it has to be sent direct. Thanks for your ever helpfulness Ian and all the best, Peter.

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