TROUBLE SHOOTING 12Vvolt ELECTRIC CIRCUIT
You will need an electric meter that you can read two functions on. First is continuity, second is 12volt DC.
Always use a fully charge battery. LOW VOLTAGE makes HIGH AMPS
will not cock or throw target:
(The term would be: My machine is dead)
Check your 12volt battery with your meter.
Check battery ring terminal leads to
battery. Clean and tighten.
Check 35-amp fuse with the meter, using
your continuity function. Just because the fuse looks good doesn’t make it
good. The element can brake away or off of the end caps and make the fuse bad. Always
Check fuse holder for 12volt DC power. You
can lose voltage in a bad fuse holder. Bad connections or little spring in fuse
holder can become weak and not make the proper contact needed. If you replace
fuse holder, remember to solder new one in. Do not use the plier-type or crimp
Check all wires and connections in control
box. Any wire may contribute to your problem. Treat ground/negative wires with
equal importance. Replace bad push on spade connectors with new ones. Always use the solder on type and solder them on.
the terminal strips screws with a little slot style screwdriver.
Motor relay chatters back and forth and
will not work properly:
Bad connection somewhere
Broken wire somewhere
Control box has 12-volt power and relay
will not change over.
Check coil side connections. They are to
two smaller wires at the bottom of relay.
Check terminal strip where two coil wires
connect to terminal strip.
Verify that voltage is passing through
toggle switch. Center pole on toggle switch should meter 12 volt DC.
Control box has 12volt power and relay
changes over properly.
A) Meter motor wires # 3 & # 4 on terminal strip to see if motor is
getting 12volt from relay. To do this correctly, put meter leads on terminal
numbers 3 & 4, with the toggle switch in the down or off position, and at
the same time push in on the black pushbutton on control box lid to change over
the relay. If you do not have 12volt reading on meter, then replace relay. If
you have 12volt reading on meter, then problem is motor. Service motor brushes
or replace if they are badly worn. If servicing motor doesn’t fix problem you
may need a new motor. REMEMBER
LOW VOLTAGE makes HIGH AMPS. The high amps you have created from low
voltage on uncharged batteries may have damaged your motor.
Machine blows 35-amp fuse all the time.
12volt machine should have 35-amp AGC
fuse. Check to see if you are using the correct fuse.
Blows new fuse-Check the battery leads for
correct polarity connections.
You can turn motor and gearbox by using
the screwdriver slot located at the back of motor. You will have to remove cap
and turn slotted bolt with long slotted screwdriver. Try replacing fuse after
you have turned motor.
Blows fuse because you can not turn
slotted bolt at back of motor with screwdriver:
arm will not stop.
term would be: My machine is throwing or firing thru)
1) Disconnect release cord at machine, as machine is firing thru, to see
if machine stops firing. If throwing arms stops and machine works correctly from
control box, fix your release cord. If you plug release cord in and the machine
starts firing thru, you know the problem is in release cord.
2) Check the brake wiring
circuit in control box. A loose connection can cause your machine to have this
problem. The brake wire on a 12volt machine is the little jumper looking wire
that is connected on the top of relay, connecting the two together. This
connection is very important. Clean, re-crimp or replace this connection as
3) Check limit switch:
A) You can check limit
switch function by using your meter and do a continuity check while you work the
limit switch head. This is just a switch, so meter the component to see if part
is working correctly. Place meter leads on number 7 & 8 and rotate limit
switch head manually to check continuity. The limit switch is wired normally
closed. This explains why you have continuity when limit switch head is not
clicked over and you do not have continuity when tab has clicked over limit
B) Make sure the tab on
bearing is making good contact with the limit switch head. The limit switch has
a roller head that rotates as it is making contact with tab on bearing. The
limit switch head can be adjusted to assure correct contact with bearing tab.
You can position roller head by adjusting the screw that attaches the limit
switch head to the body. The roller head can be adjusted to any position
necessary to assure switch works correctly.
C) To adjust limit switch,
clear machine and disconnect power source. There are two 1/8” allen set screws
located on bearing collar. This is the bearing that the steel tab is welded to
that makes contact with the limit switch roller head. To stop throwing arm
sooner, rotate bearing collar counter clockwise or towards limit switch head. To
stop throwing arm later, rotate bearing collar clockwise or away from limit
switch head. Do not hit the tab with anything. It will break off if you do.
NOT EVER HIT THE TAB ON BEARING COLLAR THAT MAKES CONTACT WITH LIMIT SWITCH
ROLLER HEAD. IF YOU CAN NOT MOVE
COLLAR AFTER YOU LOOSEN BOTH SET SCREWS, YOU CAN USE A PUNCH OR SCREWDRIVER ON
THE SET SCREWS, THEMSELVES TO TAP THE COLLAR IN THE CORRECT DIRECTION.
you are using some after market electrical parts or wiring, please refer to the
O.E.M. list to obtain the correct parts and wiring diagrams for troubleshooting
REMEMBER TO ALWAYS SOLDER ALL ELECTRICAL
ALL 12volt FUNCTIONS. LEARN TO READ AND OPERATE A METER. IT IS YOUR BEST
RESOURCE IN TROUBLESHOOTING YOUR ELECTRIC PROBLEMS.
VOLTAGE FROM AN UNCHARGED BATTERY MAKES HIGH AMPS AND AMPS CREATE HEAT OR HIGH TEMPERATURES.
FOR FURTHER HELP PLEASE CALL YOUR DEALER
OR GP TRAPS L.L.C.