HELP!! Electrical problem with 4.3L GL I/O engine
I have a 99 Larson with the Volvo 4.3 L 190 HP engine. When it starts
it runs quite well but today it seemed to be totally electrically
dead: no noise at all when trying to crank, no lights, no horn, no
blower, etc.The battery is brand new (one day old), fully charged and the clamps
are tight. This has been an intermittent problem where I would let it
sit for a bit then it would be ok but today it would not show any sign
of electrical life at all. The positive cable seems to be tightly
connected down near the starter. I can't get at the neg. cable. The
fuses seem to be ok and if it was a fuse I would think that just some
circuit(s) would be affected and it would not be this intermittent
problem. What should I be looking for that would shut down the entire elec.
system? Please help! I am very far from any Volvo service shop and need to
fix this on my own. I am sure this must be something very simple I
do have an ohm-meter but it was at home three hours away today. Any ideas would be much appreciated! |
Inno
May 21
|
| The negative cable is just as important as the positive one. Clean both.
Then check and clean the other end of both. "Inno" <inno.dubelaar@gmail.com> wrote in message |
jamesgangnc
May 22
|
| Take a meter reading from the Positive terminal to the engine block. If no
or very low voltage take a reading from the Negative terminal to the end of
the positive lead. Both ends. Find out where the open in the circuit is. |
Calif
May 22
|
| Check your tilt and trim fuses, any short will blow the fuse and your system
will be dead. Calif Bill wrote: |
Dry
May 22
|
| There are usually 2 paths 12v takes on a small boat once it leaves the
engine area. The first is thru a harness that probably has a plug on the
engine end. This set of wires runs your ignition, instruments, and anything
else that the boat mfr. deemed necessary to operate from the ignition
switch. The second path/s, which should be fused but often is not, runs
everything else on the boat. The origin for all of these paths is either the
+ battery post or a terminal on the starter. The common ground on your
engine should be a stud on the back side of a cylinder head or the -battery
post. Your problem went from intermittent to solid. Did anything work right after
you changed the battery? Could you have left off a wire that should have
been connected to the battery? Try this simple test. Turn your blower on and start wiggling all of the
wires that you can get your hands on in the engine room. If the blower
sputters or runs when you touch something, you have put your hands in the
problem area. Some of the things that could be causing you grief are internal or external
corrosion of wire terminals ( particularly if they are steel). Corrosion on
the studs or posts they are connected to. A loose connection could lead to
arcing, which will cause a totally bad connection and or insulation melting.
A bad engine harness connection ( only if this is your only source of 12v
under the dash). Good luck,
Jim
P.S. Keep a meter on your boat at all times. "Inno" <inno.dubelaar@gmail.com> wrote in message |
Jim
May 22
|
| There doesn't seem to be electrical joy anywhere on the boat. Will a trim |
Jim
May 22
|
| I'll ask this, only because I have actually seen this done. Did you take the plastic cap(s) off of the battery terminal(s)? |
Gene
May 22
|
| Hee Hee ! |
Jim
May 22
|
| While the fuses are probably not appearing blown, check them with a
continuity tester anyway. All of them. Then check the rubber covered
fuse holders & the fuses themselves for dirt/grime/film and clean them.
On the SX drives, I think there is a pair of fuses, like 20A & 30A,
that power most of the circuits including the solenoid(except for the
starter). This is from memory, check your manual. Let us know how it goes. Rob |
trainfan1
May 22
|
| The harness could certainly be the source of the problem. I have the same
engine on my boat and had to disconnect the harness in order to remove an
upholstered trim panel while installing a new swim ladder last Sunday. We
splashed the boat that same day and prior to doing so I reconnected the
battery and tested for power without starting the engine by turning the
ignition key one click. None of the gauges lit up so I checked the battery
switch, which was on and battery connections, which were tight. Finally
it occurred to me that I had disconnected the harness (located at the top
front port side of the engine) earlier in the day. I reconnected it,
tightened the holding strap and..I got power! Perhaps the harness connection was bumped or otherwise loosened and it is a
good place to start. |
JimH
May 22
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| Connect a jumper cable between the NEG terminal and engine block. Joy? |
JR
May 22
|
| I was going to suggest using a coat hanger and test the power of the
battery by jumping positive and negative. Hmmm - on second thought... DON"T TRY THAT!!! |
Short
May 22
|
