Operating instructions

Page 4
VOLTAGE
Ground
Ground
Ground
dash light switch
fuse
fuel sender
temperature
sender
pressure
sender
Sender Wire:
Ground Wire:
12 Volt Wire:
“S” or “G”
(+)
LEGEND
or
Siemens VDO Automotive Limited Warranty
Siemens VDO Automotive warrants all merchandise against defects in factory
workmanship and materials for a period of 24 months after purchase. This warr-
anty applies to the first retail purchaser and covers only those products exposed
to normal use or service. Provisions of this warranty shall not apply to a VDO
product used for a purpose for which it is not designed, or which has been
altered in any way that would be detrimental to the performance or life of the
product, or misapplication, misuse, negligence or accident. On any part or prod-
uct found to be defective after examination by Siemens VDO Automotive,
Siemens VDO Automotive will only repair or replacethe merchandise through the
oringinal dealer or on direct basis. Siemens VDO Automotive assumes no respon-
sibility for diagnosis, removal and/or installation labor, loss of vehicla use, loss
of time, inconvenience or any other consequential expenses. The warranties herin
are in lieu of any other expressed or implied warranties, including any implied
warranty of merchantabilty or fitness, and any other obligation on the part of
Siemens VDO Automotive, or selling dealer.
Siemens VDO . http://sso-usa.siemensvdo.com/. Phone: [phone]
Electrical Wiring:
Refer to the wiring diagram, Diagram G. Wire gauges in series from
a positive (+) accessory to a source which is not already overloaded
with fans, air conditioning, and such. The ground () wire is also
run in series, including the light socket ground. The final ground
run, using 14-gauge wire, should be connected to a good ground
such as the engine block ground strap or directly to the negative
battery post.
NOTE: See the separate Speedometer Installation and Opera-
tion Instructions for information on wiring the speedometer.
System Testing:
When installation and wiring has been completed, the following
tests should be performed to ensure that all systems are functioning
properly.
I. Turn on the dash light switch to see if all gauges light up. If not,
check your wiring, the ground, and all bulbs. Reconnect or replace
as necessary.
II. Turn on the ignition key. Gauges should read:
Pressure: Needle to 0
Fuel: Needle to amount of fuel in the tank
Temperature: Needle to the temperature of the engine water
a) With the key on, pull the sender wire off of the sender:
Fuel and pressure gauges: needle to the right-hand position
Temperature gauge: needle to the left-hand position
b) With the key on, ground the sender wire to the engine block:
Fuel and Pressure Gauges: needle to the left-hand position
Temperature Gauge: needle to the right-hand position
NOTE: All VDO electrical gauge pointers will peg full left-
hand position when the key is off.
III. Senders can be tested with an ohmmeter that measures from
10Ω to 2000Ω. Connect the positive (+) lead from the tester to
the sender terminal, and the negative () lead to a good ground.
The following readings should occur if the sender is operating prop-
erly:
Temperature sender engine cold: 700Ω
engine approximately 180°: 68Ω
Pressure sender engine off: 10Ω
engine running 40 psi: 105Ω
engine running 60 psi: 152Ω
IV. Voltmeter: Volts:
Key on, engine off: 12
Engine running, no accessories or lights: 13.7  14.3
Engine running with accessories, lights: 13.0  14.0
NOTE: These readings are approximate, depending on the
regulator system and engine speed. Lower readings indicate a
bad battery, regulator, or alternator; or incorrect wiring.
V. With VDO fuel tank senders (Part #226 001), an empty tank
will read 10Ω. As fuel is added, the resistance reading will rise until
the tank is full, when it will read 180Ω.
NOTE: If you already have a fuel level sender in your tank,
check the resistance readings. If they do not match the read-
ings above, VDO manufactures a number of fuel gauges
which should match your sender. REMEMBER: The ohm
range of the sender and the gauge MUST MATCH!
Diagram G
Wiring Diagram
WIRING OF POWER
AND
GROUND TO EACH
GAUGE
ILLUMINATION WIRING
AND
WIRING OF SENDERS
TO
EACH GAUGE