VOLTMETER — INSTRUCTIONS

chanical Gauges:these locations may have different average1. Drain the fluid level in the system to below thetemperatures than the original warning lightsender’s mounting location which is normallysender location.the factory’s warning light sender location.2. Do not over tighten the fittings or sender, partic2. Route the capillary tubing through the mountingularly for mechanical gauges. The threads aredesigned to strip before the engine componentcan be damaged. The fittings use taperedDiagram 1CAPTIVE FITTINGself-sealing threads and do not require extremeCAPILLARY TUBE TIPCAPILLARYforce to seal properly.TUBE3. Do not use sealing tapes or compounds onelectrical senders as this will disturb theirgrounding connection to the engine resultingin false low readings.4. Take caution when uncoiling and routing themechanical gauge’s capillary tubing that youdo not bend it too sharply or flex it too often.hole for the gauge and then through the firewall,Any break in the inner tube will make the gaugeprotecting the tubing from rough edges. Form atnonrepairable. A replacement service is availleast one 3” or larger loop of tubing as it comesable only at the factory service center.through the firewall and route the remainder to5. Always install the adapter fitting into the enginethe sender mounting locations.first and then tighten the captive fitting (Diagram 1) on the capillary tube to avoid twistingthe tubing.

3. Remove the warning light sender and install theproper adapter fitting into the engine block. Ifthe proper adapter fitting was not included withthe gauge, obtain the CP7555 (NPT threads)adapter set.4. Insert the capillary tube tip into the adapter’s holeand then tighten, with moderate pressure only,the captive fitting (Diagram 1) into the adapter.Do not over tighten. Sealing tape or compoundmay be used on either connection.5. Complete the mounting of the gauge.6. Refill the fluid level to its normal level.7. Start the engine and observe the fitting connections for leaks and the gauge for properoperation.For Electrical Gauges:1. Drain the fluid level in the system to below thesender’s mounting location, which is normallythe factory’s warning light sender location.2. Remove the warning light sender and insulatethe end of the sender wire. Install the properadapter fitting (not included) into the engineblock, if needed. Obtain either the CP7553(NPT threads) or CP7573 (metric threads)adapter set, if an adapter is needed.3. Install the gauge’s sender into the warning lightsender’s mounting location in the engine block.4. Run a length of 18-gauge insulated copperwire from the gauge’s mounting location to thesender’s mounting location.5. Attach the 18-gauge wire onto the top of thegauge’s sender.6. Facing the back of the gauge, the connectionpost on the right is for the 12-volt power, thecenter post is for the ground connection and theleft post is for the sender connection. After youhave mounted the gauge, connect the sender7.8.9.10.wire to the left connection post as shown inDiagram 2. Do not over tighten.Connect one end of another length of 18-gaugeinsulated copper wire to the center connectionpost, as shown in Diagram 2 and the other endof the wire to a good ground source.Connect a third length of 18-gauge insulatedcopper wire to the right connection post asshown in Diagram 2, and the other end ofthe wire should be connected to the fuse boxwhere the wires will receive 12 volts of powerwhenever the ignition key is in a START, ON orACCESSORY position.Refill the fluid level to its normal level.Start the engine and observe the fitting/senderconnections for leaks and the gauge for properoperation.TROUBLESHOOTINGIf your electrical gauge reads lower than you wouldexpect, check all electrical connections, particularlygrounding connections. Any poor connection willincrease electrical resistance resulting in a falselow reading.Diagram 2NUTWIRECLOSED-EYE CONECTORGROMMETFLAT WASHERMAKE SURE CRIMP

engine fitting, an then tighten the hex nut into the engine fitting. 4. Optional T-Fitting (Diagram 2)- Install the the other nipple into the warning light sender location. Install an adapter fitting first if needed. In one of the two remaining openings in the T-