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Summary of Contents for DAVIS VSS
- Page 1 ® DriveRight VSS Installation Guide Product # 8155VSS, 8155VF, 8160VSS, 8160VF...
- Page 2 © Davis Instruments Corp. 2001. All rights reserved. This product complies with the essential protection requirements of the EC EMC Directive 89/336/EC. DriveRight is a registered trademark of Davis Instruments Corp. Velcro is a trademark of Velcro Industries, Manchester NH.
- Page 3 VSS (Vehicle Speed Sensor) installation. VSS installation is only possible on the DriveRight Trip 500AL. OMPONENTS The DriveRight Trip 500AL (VSS Input) should come with all of the materials shown below. Please make sure you have all listed components before proceeding with the installation.
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Page 4: Installation
The installation is similar to installing a vehicle stereo or vehi- cle alarm. The DriveRight requires three electrical inputs; +12 V, vehicle ground, and your vehicle's VSS signal. The steps required to install the DriveRight are: 1. Determine where to mount the DriveRight display. - Page 5 Wiring Diagram The diagram below provides an overall picture of the Trip 500AL VSS installation. DriveRight Display Harness Cable White Butt Splices (3) Red Wire with Fuseholder In-Line Black Unswitched Splice +12V White Wire (if needed) Ground Male Disconnect Spade...
- Page 6 9. Step 2: Locate and tap your VSS wire The location of the VSS wire for a given make and model of vehicle can be found in the Vehicle Technical Information Guide for Cruise Control book. This book is made available to authorized DriveRight installers.
- Page 7 Step 3: Locate and tap power (+12V) and ground The DriveRight requires a constant +12 volts and has a negligi- ble drain on the vehicle battery (8 ma). You can obtain the +12V from several different places. Generally, you can easily...
- Page 8 A ground can be made by inserting the spade terminal under the head of a screw threaded into the vehicle chassis and then crimping the spade terminal onto the black ground wire, as shown below. Check that the screw is actually grounded using a multimeter before making the connection.
- Page 9 VSS in-line cir- cuit. As a technical note, the switches have following func- tions. Switch 1 is required if your VSS signal is a square wave which does not go to ground. Switch 2 AC couples the signal in and is used for sine wave VSS signals.
- Page 10 NOTE: You will need to test drive the vehicle and observe the green test LED which is enabled using switch 4. 0 (zero) means the switch is off and 1 means the switch is on. The DriveRIght unit must be plugged in for the LED to indicate.
- Page 11 Step 6: Mount the DriveRight Display in the Vehicle The following illustrations show possible mounting options for the display. TOP OF DASHBOARD (Horizontal Surfaces) Pan Head Self-Tapping Screw (2x) Split-Lock Washer Flat Washer Hex Nut Split-Lock Washer Flat Washer Right Angle...
- Page 12 Step 7: Connect the DriveRight Display and Go for a Test Drive Insert the battery into the DriveRight as shown below. Connect the harness cable to the DriveRight display cable as shown below. It is important to hold the DriveRight display cable as shown below (on the cable, not the sheath) in order to achieve a secure connection.
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Page 13: Troubleshooting
Go for a test drive and check that the DriveRight matches the speedometer. If it is not close at all, do not be discouraged since it may be uncalibrated. Consult the calibration section of the Trip 500AL User’s Guide for the Trip 500AL for instruc- tions on calibrating the unit. - Page 14 PPENDIX OMPATIBILITY The DriveRight can work with many different VSS signals pro- vided the switch settings of the VSS in-line circuit are set cor- rectly. However, if the signal does not meet the specifications below it may not work. ❏ Maximum VSS frequency at 25 mph is 1 khz (144,000 PPM).
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Page 15: Technical Support
Technical Support If you are experiencing problems with your DriveRight VSS, first be sure to check all cable connections. If you are unable to solve the problem, please call Davis Technical Support. We’ll be glad to help. Most questions can be answered while you’re on the phone. - Page 16 3465 Diablo Avenue, Hayward, CA 94545-2778 510-732-9229 • Fax: 510-732-9188 E-mail: info@davisnet.com • www.davisnet.com...