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MAGNET AND SPEED SENSOR COIL INSTALLATION
The magnets, along with the speed sensor coil provide pulses to calculate road speed for the cruise control.
When the drive shaft rotates, the magnets attached to it move by the speed sensor coil. This generates electrical
pulses which are monitored by the cruise control.
This installation will require access to the vehicles drive shaft/axle. The drive wheel end of the vehicle will need
to be lifted-up and supported with jack stands. IF YOU CANNOT SAFELY INSTALL THE MAGNET AND
SPEED SENSOR COIL YOURSELF, THEN WE RECOMMEND THAT YOU HAVE IT INSTALLED BY A
QUALIFIED PROFESSIONAL.
MAGNET LOCATION:
Rear wheel drive vehicles: Magnet location is not to exceed 12 inches (30 cm) from the front (transmission end)
universal joint, or damage may result from the lateral movement of the drive shaft. See Figure 1.
Front wheel drive vehicles: Select either the right or left axle shaft near the transmission housing. Select the
side with the best accessibility, and insure there is adequate clearance for the mounting magnets and speed
sensor coil. See Figures 6 or 7.
NOTICE: It is important to keep the magnets as close to the transmission's housing as possible. Leave
adequate clearance from the catalytic converter and exhaust pipes.
Step 1: Clean the magnet mounting location. Use coarse sandpaper or a wire brush to clean the axle surface.
Complete by wiping with cleaning solvent.
Step 2: Rear wheel drive vehicles require one magnet to be secured to the drive shaft.
Front wheel drive vehicles require two magnets to be secured to the drive axle.
Step 3: Cut a 2" strip of paper approximately 11" long. Wrap this strip around the drive shaft and mark paper
as shown in Figure 2. This will give you the total distance around the drive shaft (circumference). Cut the strip
at this mark.
Step 4: Measure length of the strip and divide this number by the number of magnets (per Step 2) your vehicle
requires. Mark these locations on the strip. These are the center lines for the magnets.
Step 5: Tape the strip around the drive shaft at the location chosen for the magnets. Remove backing paper
from double sided foam and press onto the magnet. Remove remaining strip of backing paper and place the
magnet or magnets on the cleaned drive shaft/axle, not the paper. Be sure magnet tabs are lengthwise on the
shaft. See Figures 4 or 9. Then remove the paper strip.
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