To start my motor
I now need to clamp a relay closed using a wooden clothespin. (I'll pause a moment while you laugh...
May I ask for some advice/opinions?
Setting the stage: That relay is part of the electronic control box
and allows power to the glow plugs. Once the motor
cranks over and starts I remove the clothespin & normality returns. If the motor is warm, then no little tricks are required. (The control box
also acts upon over temp and/or low oil
pressure alarms, etc.) This problem only recently surfaced. No motor maintenance
was performed between "it works" and "it doesn't work".
Left to it's own actions during the start cycle there's approx 3.5 vdc seen on the relay contact's output leg; the motor cranks but doesn't start.
With clothespin applied, it becomes battery-level power (13.whatever vdc) seen on the relay contact's output leg; ; the motor cranks and starts.
During my testing, I disconnected the relay's output wire and then temporarily ran a separate 10 AWG wire off a 30 amp ckt bkr to the glow plugs. With that breaker acting as a "relay", all worked fine.
I'm unable to determine if there is insufficient current
to hold the relay closed, or if the relay itself is faulty. I've tried cleaning
the relay contacts with emery cloth, to no avail. Swapping out the glow plugs with a new set makes no difference.
IF there were a handy-dandy electronics
shop around then I'd just start replacing parts
beginning with the relay, but I'd be winging it. There are no markings on the components that I can see to indicate part numbers or mfr. And I'm leery of arbitrarily installing just any-old-relay due to the amount of current
the plugs apparently require.
It's a Lehman/Peugeot marine-modified 4-cyl/60HP diesel
motor, installed in '87, and there doesn't appear to be much tech help available. At least on-line. So far, I've been unable to locate electronic schematics for this little box. My owner's manual doesn't delve into electronic details.
To clarify, this is not the starter solenoid I'm talking about but a relay who's only apparent (to me) purpose is to provide power to the glow plugs. (And that the motor demands active glow plugs here at 15 degrees South is a different topic.)
On the one hand, it's a great anti-theft system
; on the other hand, this could be a PITA should a 2AM re-anchor maneuver come about.
Advice? Suggestions? Opinions?