Actron CP7955 - Manual

1
A voltmeter measures the voltage (pressure of
electricity) between the two points where the leads
are connected. Most vehicles will show between
13 and 15 volts while being operated above idle
speed. Check your owners manual or dealer for
a more exact normal voltage for your vehicle. A
voltmeter is useful in that it can give a warning of
many electrical problems and can show many
problems faster than an ammeter.
PRECAUTIONS
1. Follow the instructions carefully for the se-
quence of nuts and washers on the connec-
tion posts of the voltmeter Diagram 1.
2. Disconnect the battery’s ground cable before
working on the voltmeter connections.
INSTALLATION
1. Disconnect the ground cable from the battery.
2. Connect a length of 18-gauge insulated cop-
per wire to a good ground source. Be sure
the grounding surface is a good ground source
as not all metal surfaces inside the vehicle
are well grounded. This wire should be long
enough to reach the voltmeter’s mounting lo-
cation.
3. Connect another length of 18-gauge wire to a
location on the fuse box where the wire will
receive power whenever the ignition key is in
the START, ON or ACCESSORY positions.
This wire should also be long enough to reach
the voltmeter.
VOLTMETER — INSTRUCTIONS
NUT
WIRE
FLAT WASHER
NUT
WASHER
VOLTMETER
GROMMET
U-BRACKET
DO NOT LEAVE ANY HARDWARE
OUT OF THESE CONNECTIONS
Diagram 1
4. After mounting the gauge, the wire from the
ground source (Step 2) should be connected
as shown in Diagram 1, to the voltmeter’s con-
nection post marked “–”.
5. The wire from the fuse box (Step 3) should
be connected as shown in Diagram 1, to the
voltmeter’s connection post marked “+”.
6. Reconnect the battery ground cable. As you
do, watch for sparks and check if the wiring
you worked with is getting warm. If either con-
dition is noted, IMMEDIATELY disconnect the
battery ground cable and read the Trou-
bleshooting section.
TROUBLESHOOTING
1. If, when you reconnected the battery ground
cable, you noticed sparks or any of the wiring
getting warm, check that all connections are
properly located, and insulated from ground-
ing.
2. If the reading on the gauge stays at the low-
est marked voltage when the ignition is
switched on, then try reversing the wires on
the gauge’s connection posts “+” and “–”.
3. If the gauge reads lower than you expect,
check all connections, especially those to a
ground source. A poor connection causes
resistance which gives a false low reading.
CLOSED-EYE CONECTOR
MAKE SURE CRIMP IS GOOD
VOLTIMETRO – INSTRUCCIONES - TENSIÓN 12 V
VOLTMÈTRE - INSTRUCTIONS
PARA NOMBRE, DOMICILIO Y TELEFONO DE IMPORTADOR: VER EMPAQUE.