| Author |
Message |
doug yes (Dougg)
Registered Member
Username: Dougg
Post Number: 7
Registered: 1-2007
Posted From: 4.235.252.25
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 06, 2007 - 8:57 pm: | |
Thanks y'all for the info on the Fuel Pro!
The tachometer needle was intermittant reciently and finally died. Where do I start??? (103DL3 w/ S-60 & 755 Allison) |
James Stacy (Jimstacy)
Registered Member
Username: Jimstacy
Post Number: 32
Registered: 1-2001
Posted From: 75.14.4.87
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 07, 2007 - 10:56 am: | |
Usually connected to the "R" terminal on the alternator. This point generates a pulsing DC waveform and the tach counts the pulses.
If I keep my solar panels connected to the battery while I'm driving, they will top off the battery bank and the alternator will quit charging. This drives the tach nuts. Without the additional source of power messing with the regulator, the alternator will keep a small charge rate going and the tach is happy.
HTH |
Pete/RTS Daytona (Pete_rtsdaytona)
Registered Member
Username: Pete_rtsdaytona
Post Number: 305
Registered: 1-2005
Posted From: 72.40.13.12
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 07, 2007 - 4:59 pm: | |
Doug
One way to test is to cut the circuit in half - is it the Meter or the Sender
Using a 12volt "wall Wart" (those little transformers that plug in the wall)
Disconnect the tach sender wires and hook the neg side of the 12v wall wart to ground - the other side to the tach signal line - turn the ignition on and see what the tach reads
If the tach is an "R" terminal driven device the tach should read 410 RPM - if the tach is driven from a standard DDEC style 12 pulses per revolution - that would equal 600 rpm on the tach
You might even get away with using a small cheap 12 volt battery charger in place of the wall wart - the cheaper the better (no filtration to smooth out the inverted sine wave pulses (full wave rectified)
no reading then - go after the sender side of the circiut
Pete RTS/Daytona |
larry currier (Larryc)
Registered Member
Username: Larryc
Post Number: 15
Registered: 2-2007
Posted From: 207.200.116.13
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 07, 2007 - 11:06 pm: | |
Doug, Sometimes my circuit breaker needs wiggling.I usually don't have as many component failures as electrical ones. |