No power to fuel pump or choke 5.0 gl pefs

[Kyboatlife]

yes I have no power to the fuel pump I can jump it at relay and it will kick on but with the relay in it will not kick on and relay is good I have check every fuse still no power

 

[alldodge]

Is your kill switch (man overboard) ON

 

[Kyboatlife]

yes kill switch is hooked up as it should be I have never ran into this I have been working as boat mechanic for a little over a year and this has me stumped is there a way to test if it's the diode in the orange wire

 

[Kyboatlife]

When I tested the orange wire at the relay while cranking over I had little over 8 volts

 

[Kyboatlife]

Also after sitting for a while it will fire up for bout 3 sec then shuts off

 

[itsathepete]

Oil pressure switch?

 

[alldodge]

Once the carb is filled it should keep running even without the pump running, so we have 2 possible problems.

All of the early GL's used Yel/Red from the key to energize the start assit relay and the FP relay thru a diode. Once running power comes from the Alternator Green wire thru another diode to keep FP relay ON

Power to coil and ALT comes from the Key switch purple wire

To check a diode, use a miltimeter and set it on the diode scale (will have a diode symbol). Place leads on each side of the diode and one way the meter will show a high resistance. When lead are swapped the meter will show low resistance or next to zero

So with key turned ON there should be 12V at the ALT and coil and alarm will sound. Might disconnect alarm until problems are found

 

[Kyboatlife]

Ok thanks so much for your help appreciated very much not a good feeling being stuck on something you know is there but can't find. On the diode is that in the main harness wrapped up

 

[alldodge]

The diodes are close to the relay and inside the harness in most cases. There small and can be over looked