fuel gauge
Thread Starter
|
Freshman User
Joined: Sep 2010
Posts: 26
Likes: 0
fuel gauge
I have a '66 f-100.I have put in a new sensing unit and replaced the fuses but still the gauge does not work at all. What else can it be? I have the little round gauge package/speedo. temp gauge also does not work at all. idiot lights for alt and oil pressure work. I replaced the ground wire to sending unit and put anew connector to the sending unit =. the wire looks good to the harnes and is connected to the gauge? I 'm new to this and have no idea where to look next. Thanks for any help.
Laughing Gas
Joined: Mar 2005
Posts: 1,109
Likes: 9
From: Thornton, Colorado
I would check on the little voltage regulator from the back of the speedo. It seems like to me that would be the most likely culprit. It looks like a little box with two small electrical blade connectors coming off of it. I don't believe the idiot lights use it, but the gauges do.
Lead Driver
Joined: Aug 2003
Posts: 6,305
Likes: 18
From: Boulder Creek, Ca
You can see from the diag. the CVR unit is also tied into the other gauges, think you will find if CVR unit is faulty the other gauges should also be effected. As Broomfieldbum mentioned possibily the CVR unit. You can test the CVR unit by taking volt meter should fluxuate between 0-9 volts. If the other gauges are working then you may try testing the fuel gauge, disconnect the leads and take a 2D cell flashlight batteries, positive to 1 side of the gauge and the other side of the gauge to neg. side of flashlight. Usually find the neg. side of flashlight is at the on/off button. Anyhow, food for thought?
http://i300.photobucket.com/albums/n...reDiagP5-1.jpg
http://i300.photobucket.com/albums/n...reDiagP5-1.jpg
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
If the ICVR = Instrument Cluster Voltage Regulator is defective, it also affects the temperature gauge.
When this regulator begins to fail, the needles on the fuel and temp gauges do the "hula" as they swing back and forth on their own.
B9MZ10804C .. ICVR (Motorcraft GR508) / Obsolete from Ford / Available from autoparts stores.
Fits: 1961/66 F100/1100 // 1959/66 Galaxie/LTD/Thunderbird / 1960/65 Falcon/Comet / 1962/65 Fairlane/Meteor / 1965/66 Mustang / 1966/77 Bronco.
Take the old ICVR with you to the parts store to match it up. There are other types, so you wanna make sure you get the correct one.
When this regulator begins to fail, the needles on the fuel and temp gauges do the "hula" as they swing back and forth on their own.
B9MZ10804C .. ICVR (Motorcraft GR508) / Obsolete from Ford / Available from autoparts stores.
Fits: 1961/66 F100/1100 // 1959/66 Galaxie/LTD/Thunderbird / 1960/65 Falcon/Comet / 1962/65 Fairlane/Meteor / 1965/66 Mustang / 1966/77 Bronco.
Take the old ICVR with you to the parts store to match it up. There are other types, so you wanna make sure you get the correct one.
Thread Starter
|
Freshman User
Joined: Sep 2010
Posts: 26
Likes: 0
Thank you guys sooo much! yes, the gauges did the hula before they stopped working all together. I hope to get this repaired today. thanks again, I cann't tell you how much this site is helping me with my sons truck. will keep you posted with results.
Thread
Thread Starter
Forum
Replies
Last Post
jim collins
1973 - 1979 F-100 & Larger F-Series Trucks
7
Oct 10, 2015 08:25 PM
hoss73ford
1973 - 1979 F-100 & Larger F-Series Trucks
3
Aug 11, 2015 10:47 AM
jrockdiddy
1948 - 1956 F1, F100 & Larger F-Series Trucks
7
Jul 23, 2015 09:44 AM
TBird Larry
1961 - 1966 F-100 & Larger F-Series Trucks
11
Aug 22, 2014 06:30 PM
