97 Volvo Penta 5.7L GLPLKR I/O Parts help

[trailshredder]

With the key on, I have 2 purples with 12v, one purple with 0 and the ground.

 

[alldodge]

With the key on, I have 2 purples with 12v, one purple with 0 and the ground.

Does anything change when the kill switch is flipped in the other direction?

 

[trailshredder]

Got a chance to play with this today.


I have 12 volts on 2 of the 3 purple wires, when the ignition is in the on position and 12 volts on all three when in the start position (cranking).

The MOB safety switch in normal mode has continuity across the ignition terminals and no continuity across the magneto terminals and when pulled it has continuity across the magneto terminals and no continuity across the ignition terminals.

I have tried numerous ways of hooking up the wires on the MOB switch and nothing has worked. The engine only runs while cranking, as soon as I let of the key, its wont stay running, as if I am shutting it off immediately.

 

[alldodge]

I have 12 volts on 2 of the 3 purple wires, when the ignition is in the on position and 12 volts on all three when in the start position (cranking).

This is the problem, the purple wires should have 12V on all 3 when the ignition is ON and the MOB switch is ON. You want all purple wires to be on the I terminals of the MOB switch. Can bypass by jumping all purple wires together, but make no connection to the black. The one which is turned on during cranking is being done by the start circuit back feeding the purple (electric fuel pump)

Normally this would not happen because of a blocking diode. The puzzling part is if the diode was put in backwards it could happen, but does not explain why 12V is not supplied by the other purple wire unless the MOB is not wired correctly or not making contact. If the diode was shorted, the you could not turn the motor off because the ALT would keep supplying power

 

[trailshredder]

Is there any chance it could be a faulty starter relay or breaker?

 

[alldodge]

Looked in the LK manual and its showing the same as I have. Need BruceB to assit because I'm missing something I guess. Using the GL-A thru GL-E show the similar wiring, and don't see any relay and if a fuse blew I don't see if running at all.

 

[alldodge]

Check the starter wiring on the small terminals. Should have purple/yellow on the left and Yellow/Red on the right

 

[trailshredder]

Got a chance to play with this last night. Still no luck! I have tied all three purple together and verified the starter wiring to the small terminals. I took a video of the boat starting and dying.

 

[alldodge]

Only way I know to find the issue is with a voltmeter. Turn key ON and start tracing where until it is found

 

[trailshredder]

How do I know if I have the GL-A or GL-E to use your wiring diagrams?

 

[alldodge]

How do I know if I have the GL-A or GL-E to use your wiring diagrams?

Don't know but the Purple wires all go to the same locations on both. I have drawings for A thru E and posted the A and E because BruceB mentioned it should have a presolite distributor, he should have more input then I on the wiring

 

[alldodge]

Will try and post a helm wiring later

 

[alldodge]

Helm wiring

 

[Scott Danforth]

wiring colors are standard American Boat and Yacht Council Standards

American Boat and Yacht Council Standards
COLOR	ITEM	USE
Black	Ground	Negative / Neutral Main Return
Blue-Stripe	Tilt up and or trim out	Tilt and or trim circuits
Brown	Alternator Charge Light	Generator Terminal or Alternator Auxiliary Terminal to Regulator
Brown	Generator Armature	Generator Armature to Regulator
Brown	Pumps	Circuit Breaker or Switch to Pumps
Brown w/Yellow	Bilge Blowers	Circuit Breaker or Switch to Blower
Dark Blue	Cabin & Instrument	Circuit Breaker or Switch to Lights
Green or Green w/Yellow Stripe	Bonding System	Grounding Wires (if insulated)
Green Stripe	Tilt down and/or trim in	Tilt and or trim circuits
Grey	Navigation Lights	Circuit Breaker or Switch to Lights
Grey	Tachometer	Tachometer Sender to Gauge
Lt. Blue	Oil Pressure	Oil Pressure Sender to Gauge
Orange	Accessory Feed	Ammeter to Alternator or Generator
Orange	Common Feed	Distribution Panel to Accessory Switch
Orange	Feed	Accessory Circuit Breakers or Switches
Pink	Fuel Gauge	Fuel Gauge Sender to Gauge
Purple	Ignition	Ignition Switch to Coil & Electrical Instrument
Purple	Instrument Feed	Distribution Panel Electrical Instruments
Red	Power Feeds	Positive Main Power (particularly un-fused)
Tan	Water temperature	Water temperature sender to gauge
Yellow	Generator Field	Generator to Regulator Field Terminal
Yellow	Ground	Negative / Neutral Main Return
Yellow w/Red	Starting Circuit	Starting Switch to Solenoid

 

[trailshredder]

Helm wiring

Appreciate it! What is item 17 on the diagram?

 

[alldodge]

Appreciate it! What is item 17 on the diagram?

That is the alarm buzzer