Home |
Search |
Today's Posts |
#1
posted to rec.boats.building
|
|||
|
|||
Boat wiring - instruments
I'm rehabing my old '90 Chris Craft Limited 245....I/O...350
cobra...runs great.. I'm- basically redoing all of the front end wiring, instrumentation and breakers (was in **** poor condition when i got it). I have the instrument panel on my workbench and I'm wiring up the new instruments....daisy chaining the Ground, the Ignition, and Light terminals. Checked my continuity between the instruments on each line (G, I, L), and of course since they are all daisy chained, i get continuity. Great, that is expected. What isn't expected is that i am getting continuity across the G, I, L, and S terminals on the instrumenets, including instruments right out of the box with no wiring hooked up to them. This doesn't make sence that this would be. I wired everything up and tested my lightning and even though it appears there is a short across the terminals, the lighting works. The majority of my instruments are Teleflex, if that matters. Any suggestions?? |
#2
posted to rec.boats.building
|
|||
|
|||
Boat wiring - instruments
|
#3
posted to rec.boats.building
|
|||
|
|||
Boat wiring - instruments
On May 31, 6:45 pm, Brian Cleverly wrote:
wrote: I'm rehabing my old '90 Chris Craft Limited 245....I/O...350 cobra...runs great.. I'm- basically redoing all of the front end wiring, instrumentation and breakers (was in **** poor condition when i got it). I have the instrument panel on my workbench and I'm wiring up the new instruments....daisy chaining the Ground, the Ignition, and Light terminals. Checked my continuity between the instruments on each line (G, I, L), and of course since they are all daisy chained, i get continuity. Great, that is expected. What isn't expected is that i am getting continuity across the G, I, L, and S terminals on the instrumenets, including instruments right out of the box with no wiring hooked up to them. This doesn't make sence that this would be. I wired everything up and tested my lightning and even though it appears there is a short across the terminals, the lighting works. The majority of my instruments are Teleflex, if that matters. Any suggestions?? What Ohm scale range are you using on the meter ? You are reading the resistance of internal components... Increase the meter scale range to highest and see what you get... I'll bet it is not a dead short. Brian C i'm getting about 70 ohms between IGN and GND, 1 ohm between LGHTS and GND, 70 between LGHTS and IGN, and about 85 between IGN and SNDR. |
#4
posted to rec.boats.building
|
|||
|
|||
Boat wiring - instruments
|
#5
posted to rec.boats.building
|
|||
|
|||
Boat wiring - instruments
On May 31, 9:39 pm, Brian Cleverly wrote:
wrote: On May 31, 6:45 pm, Brian Cleverly wrote: wrote: I'm rehabing my old '90 Chris Craft Limited 245....I/O...350 cobra...runs great.. I'm- basically redoing all of the front end wiring, instrumentation and breakers (was in **** poor condition when i got it). I have the instrument panel on my workbench and I'm wiring up the new instruments....daisy chaining the Ground, the Ignition, and Light terminals. Checked my continuity between the instruments on each line (G, I, L), and of course since they are all daisy chained, i get continuity. Great, that is expected. What isn't expected is that i am getting continuity across the G, I, L, and S terminals on the instrumenets, including instruments right out of the box with no wiring hooked up to them. This doesn't make sence that this would be. I wired everything up and tested my lightning and even though it appears there is a short across the terminals, the lighting works. The majority of my instruments are Teleflex, if that matters. Any suggestions?? What Ohm scale range are you using on the meter ? You are reading the resistance of internal components... Increase the meter scale range to highest and see what you get... I'll bet it is not a dead short. Brian C i'm getting about 70 ohms between IGN and GND, 1 ohm between LGHTS and GND, 70 between LGHTS and IGN, and about 85 between IGN and SNDR. The only reading that could be called anywhere near to a "short" is the LGHTS-GRND. That will be meauring the resistance of a light bulb. Why don't you remove a bulb and check it specifically. Personally, without knowing the specific instruments, I'd say everything is AOK. Brian C Yeah, I get the same thing across the bulb....Guess everything is fine then. I'm used to working with AC where any continuity across hot and ground is a very bad thing!! |
#6
posted to rec.boats.building
|
|||
|
|||
Boat wiring - instruments
|
#7
posted to rec.boats.building
|
|||
|
|||
Boat wiring - instruments
On Sun, 01 Jun 2008 07:41:01 -0500, dazed and confuzzed
wrote: Measure the resistance of a cold incandescent bulb sometime. AC or DC doesn't matter. Cold they are nearly a short. The resistance goes up 30 to 50 times as they heat up. Casady |
#8
posted to rec.boats.building
|
|||
|
|||
Boat wiring - instruments
Richard Casady wrote:
On Sun, 01 Jun 2008 07:41:01 -0500, dazed and confuzzed wrote: Measure the resistance of a cold incandescent bulb sometime. AC or DC doesn't matter. Cold they are nearly a short. The resistance goes up 30 to 50 times as they heat up. Casady my point exactly. He's measuring them cold. -- “TANSTAAFL” __________________________________________________ __________________________ America: Ironically, the safest place to be anti-American. __________________________________________________ __________________________ "A prudent man foresees the difficulties ahead and prepares for them; the simpleton goes blindly on and suffers the consequences." - Proverbs 22:3 |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
general boat wiring? | Electronics | |||
Help wiring bass boat | Electronics | |||
Fishing boat wiring | General | |||
Replacing sail boat marine instruments. | General |