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Siemens ®VDO Siemens VDO Limited Warranty
VDO North America warrants all merchandise against defects in factory workmanship and materials for a period of 24 months after purchase. This
warranty 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 product found to be defective after examination
by VDO North America, VDO North America will only repair or replace the merchandise through the original selling dealer or on a direct basis. VDO
North America assumes no responsibility for diagnosis, removal and/or installation labor, loss of vehicle 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 merchant-
ability or fitness, and any other obligation on the part of VDO North America, or selling dealer.
(NOTE: This is a Limited Warranty as defined by the Magnuson-Moss Warranty Act of 1975.)
Programmable Tachometer
Installation Instructions
Instruction Sheet # 0 515 012 020
Rev. 0
9
-0
4
INSTRUCTIONS FOR THE INSTALLATION OF THE PROGRAMMABLE TACHOMETER
ARE CONTAINED HEREIN. USE IS RESTRICTED TO 12-VOLT NEGATIVE GROUND
ELECTRICAL SYSTEMS. LIGHT BULB, IF SUPPLIED, IS 12 VOLT.
Siemens ®VDO
Tools and Materials Needed For Installation:
16 Gauge stranded, insulated wire
Non-insulated ¼" spade connectors
3
¹" or 3³" or 4" hole saw
Drill and drill bit set
Half-round file
Tape measure or ruler
Small tools: wrench or nut driver, utility
knife, pliers, etc.
Tachometer Installation:
To Begin, go to
#
–
1. Select the location where you will mount
the gauge, and mark a center point.
2. Cut either a 3
¹" (80 mm) or a 3³" (85
Wiring the Tachometer:
These instructions contain informa-
tion about gauges of different sizes.
Consequently, you must determine
the size of your gauge before cutting
any holes!
CAUTION!!!
mm) or a 4" (100 mm) hole, depending on
the size of the tachometer youre installing.
If the gauge is too snug, use a file to slightly
enlarge the opening. (Diagram A)
3. Slip the mounting bracket or the VDO
Spin-Lok Clamp over the back of the ta-
chometer as shown in Diagram B. Tighten
until the tachometer can no longer be ro-
tated by hand. D
O
N
OT
O
VERTIGHTEN
.
1. Run wires from the tachometer loca-
tion to a:
a) +12 volt power terminal.
(This positive power source
MUST BE SWITCHED, and
should be protected with a fuse);
Item Description
Quantity
1.
Programmable Tachometer
(3
¹" [80 mm] diameter)
1
or
Programmable Tachometer
(3
³" [85 mm] diameter)
1
or
Programmable Tachometer
(4" [100 mm] Tachometer
1
2.
Lamp Socket (Push in, wedge-type)
2
3.
Light Bulb (12-volt / G.E. #158 or equivalent)
2
4.
VDO Spin-Lok Clamp or mounting bracket
1
5.
Installation Instructions
1
Parts List
If in doubt, please contact your
dealer or VDO Instruments at (
800)
265-1818.
CAUTION: Read these instructions
thoroughly before making installation. Do
not deviate from assembly or wiring
instructions. Always disconnect battery
ground before making any electrical
connections.
NOTE:
If you will use your tachometer with
an alternator, you must first wire it (Diagram
E) and calibrate it (Diagrams D & F) before
mounting it. For all other applications, start
here.
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Diagram E
Proper wiring of the VDO Programmable Tachometer with typical ignition systems
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P
OTENTIOMETER
Diagram F
Fine adjustment of the VDO Tachometer when used with an alternator
–
Compare the VDO Tachometer
reading with that of a reference
tachometer.
—
Adjust the
potentiometer
on the back of
the tach.
When the VDO Tachometer reading
matches that of the reference tachom-
eter, the adjustment is complete.
R
EFERENCE

TACHOMETER
C
RANKSHAFT
Siemens VDO . http://sso-usa.siemensvdo.com/ . Phone: 1-800-265-1818 F4?C`Y^