wierd problem

Wiring, lights, heater controls, anything electrical..
Post Reply
luckybob

wierd problem

Post by luckybob »

I've had this very wierd intermittant problem with my gauges.

Its rather hard for me to explain this so bear with me

scenario one:
my fuel gauge is incorrect, it goes to half way for a full tank.
My oil gauge is low and my temp gauge is correct.

scenario two:
gas gauge works right ans shows correct fuel level
oil gauge is normal
Temp gauge is twice what it should be.

I removed what looked like a little wire extension off of my temp sending unit when i first got it and when I replaced the sender.

Now my gauges on my truck switch like that ever other day or so.

What could this be?

Did that wire actually make a difference?

User avatar
Jeffc
Sweptline.ORG Pioneer
Sweptline.ORG Pioneer
Posts: 1954
Joined: Wed Dec 31, 1969 6:00 pm
Location: Vancouver, WA
Contact:

Post by Jeffc »

Is the oil pressure gauge manual or electric?
and what year truck?
may be a grounding problem with the dash gauge set,
but might be some other problem to, does your
gauge set have a ground wire to the back of
the set housing? should be a white wire attached
to housing by a philips screw.
http://imageevent.com/jeffc
62 D100 225 3sp lwb
64 D100 A318 727pb custom lwb
66 D100 A318 4sp lwb
68 D100 B383 727 swb
65 Dart GT LA273 2bbl 904
73 Scamp 225 2bbl 4sp od
68 P300 318 727 base Oasis 22' RV
71 for sale D200 318 auto parts truck could be fixed compleat $400
Old iron or no iron!
One size does NOT fit all!

luckybob

Post by luckybob »

1. electric
2. 1969
3. I've replaced the dash once and the wire was correctly replaced.

User avatar
Jeffc
Sweptline.ORG Pioneer
Sweptline.ORG Pioneer
Posts: 1954
Joined: Wed Dec 31, 1969 6:00 pm
Location: Vancouver, WA
Contact:

Post by Jeffc »

Are you sure that you replaced the sending unit with a
proper oms unit? why I ask is if the other gauges read
low and temp reads right (1)and then the others read
right and temp reads high (2) that would explain that
part.
All 3 gauges run off the fuel gauge voltage limiter built
into the fuel gauge.
What I hear is here is a voltage verance ether in supply
to fuel gauge, or by the voltage limiter (voltage regualtor)
built into the fuel gauge, or a voltage drain in that part
of the system somewere. It still can be a grounding
issue and I would run a new ground wire from gauge
pod frist to the fire wall at least and see if that helps,
then check all ground points and clean them all and if no help then......
Were I would start is with the sender you replaced
and just unplug it and see if it changes how the fuel
and oil gauge respond, if they respond right then
it's got to be in that part of the system.
I would also check feed wire off the key that feeds the gauges to make sure that voltage
is constent at 12+ volts and clean all plugs on the fire wall if it hasn't
been done for sometime, if not 12+ then it maybe a key switch.
I would work my way back the doing the same with the other gauges from there switching from plug on sender and then a the gauge back on each.
http://imageevent.com/jeffc
62 D100 225 3sp lwb
64 D100 A318 727pb custom lwb
66 D100 A318 4sp lwb
68 D100 B383 727 swb
65 Dart GT LA273 2bbl 904
73 Scamp 225 2bbl 4sp od
68 P300 318 727 base Oasis 22' RV
71 for sale D200 318 auto parts truck could be fixed compleat $400
Old iron or no iron!
One size does NOT fit all!

luckybob

Post by luckybob »

alright, i had to read it twice. but I will check it out reall soon.

Post Reply