INSTALLATION MANUAL Product #’s: 8140, 8143, 8146, 8150
1. CONTENTS OF PACKAGE 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19.
2. INTRODUCTION The Davis DriveRight™ is designed to allow straightforward installation. The specific details of installation vary by vehicle model and year. This manual provides general instructions sufficient to guide a professional installer or knowledgeable, experienced individual through a successful installation. Please read or at least skim the entire manual before beginning the installation. Read and understand each step thoroughly before starting that step.
• wire stripper • various screwdrivers • pliers Figure 2: Typical Installation 3
3. PLANNING YOUR INSTALLATION Figure 2 illustrates the installation of the DriveRight. The sensor, sensor magnet and associated brackets mount underneath your vehicle. Figure 12 on page 11 is a sketch of a typical rear wheel drive sensor installation while Figure 17 on page 13 is a sketch of a typical front wheel drive sensor installation. The sensor leads run under the vehicle and into the vehicle cabin where they connect to the DriveRight display.
Step 1. DISPLAY MOUNTING OPTIONS The DriveRight comes with the hardware necessary for a variety of display mounting options. The long harness cable (4) included with the DriveRight allows you to install the display where you want it. You may, at your option, use the coiled cable extension (3) for even greater convenience. • Use the visor clip (5) to mount your display on a visor or door pocket. Install the clip on the top or bottom of the display to orient the display as you wish (Figure 4).
Figure 4: Using the Visor Clip Loops Hooks 15 2x Figure 5: Applying VELCRO 6
Step 2. +12V POWER AND GROUND CONNECTIONS NOTE: Thinking ahead...In Step 5, you will bring the sensor leads, +12V wire, and ground wire to a single point of your choice under the dash and connect them to the display harness cable. Choose this single point now. The sensor leads must be led into the vehicle cabin. Usually you can use an existing feedthru in the firewall.
A ground connection may be made be inserting the spade terminal (19) under the head of a screw threaded into the vehicle chassis (Figure 8). Use a multimeter to verify the ground connection to vehicle chassis. The fusebox mounting screws are candidate connections. If a screw is not convenient, locate a ground wire that is 22-18AWG or has the same diameter as the black ground wire. Use an in-line splice (20) to make the connection to the black ground wire.
Figure 8: Crimping the Spade Terminal : Figure 9: Splicing for Unswitched +12V 9
Step 3. SENSOR INSTALLATION The sensor installation requires mounting a magnet on the drive shaft of a rear wheel drive vehicle or on the in-board CV joint hub of a front wheel drive vehicle. The reed switch sensor (25) is mounted on a bracket opposite to the magnet rotating on the drive shaft or in-board CV joint hub. The sensor detects the magnet as it passes. The gap between the magnet mount and sensor must be 3/8” - 5/8” (10-16mm) (Figure 11 and Figure 15).
Figure 12: Typical Installation (Rear Wheel Drive) Figure 13: Installing the Magnet (Rear Wheel Drive) 11
FRONT WHEEL DRIVE NOTE: Thinking ahead...Choose the in-board CV joint hub you want to use by looking at how you can mount the sensor and how in Step 5 you will route the wires into vehicle cabin . Consider where feedthrus are and how you will make the connections in Step 6. Select an in-board CV joint hub and install the magnet (22) in its mount (23) using the large tie wrap (24) as shown in Figure 16.
Figure 17: Typical Installation (Front Wheel Drive, Engine Mount) 13
Step 4. SENSOR BRACKET INSTALLATION (CONTINUED) The instructions below describe an optimal sensor bracket assembly. Due to the variations in individual cars, you will need to adapt these instructions to fit the sensor bracket into whatever situation exists. As you do so, it is vital to insure that THE SENSOR END PROTRUDES 3/4” (19mm) FROM THE SENSOR MOUNTING BRACKET. See Figure 11 on page 10 or Figure 15 on page 12. In addition, the brackets must not protrude below other parts on the vehicle underbody.
Figure 19: Wrong Way To Use Brackets Step 5. WIRE ROUTING Use the split flexible tubing (36) to protect the sensor leads from sensor up into the vehicle cabin. Use the small tie wraps (37) to hold the leads against the underbody of your vehicle. The tubing can be cut into pieces and used where the wires may rub against sharp points or edges and where the leads are tie wrapped to the underbody. Tubing can also be used where the leads are particularly exposed.
Step 6. WIRE CONNECTIONS Make final connections (Figure 21). Use the butt splices (21) to connect the white sensor lead to harness cable white wire, the black sensor lead to harness cable black wire, and the red +12V wire w/ fuseholder to harness cable red wire (Figure 22). Stripped wire ends should be 3/16”- 1/4” (5-6 mm). Use an in-line splice to connect the black ground wire to the black sensor lead near the butt splice (Figure 23). Install fuse (17) in fuseholder.
Figure 22: Crimping the Butt Connectors Figure 23: Splicing Ground Together 17
Step 7. INITIAL TEST To check the installation of the DriveRight, follow the test procedure below. NOTE: It is not necessary to enter a code in order to perform this test. DO NOT ENTER A CODE UNTIL YOU READ THE USER’S MANUAL. 1. Insert the battery (2) into the display as shown in Figure 24. (If your battery is already installed, you may need to press MODE to “wake up” the unit.) Figure 24: Installing the Battery The screen you should see is the current readings screen.
3. With the ignition off, insert the DriveRight display cable into the harness cable connector and lock the connectors. To do this, you will need to grasp the display cable just behind the plastic sheath covering the connector, as shown below. Push the display cable in until it locks into place. Figure 27: Connecting the Display Cable to the Harness Cable NOTE: To disconnect the two cables, hold the plastic sheath on the display cable, as shown below. Pull back until the two connectors separate.
4. Roll the car forward slowly so the driveshaft or CV joint hub complete at least one complete revolution. You should perform this test while the vehicle is on the ground and not on the stand. As the vehicle suspension takes up the weight of the vehicle, the driveshaft and CV joint hub move. The sensor must be properly aligned with the magnet in this normal condition. The dot should appear and then disappear each time the magnet passes the sensor.
4. TROUBLESHOOTING GUIDE A successful installation requires the following. 1. White sensor wire is connected to the white wire of the harness cable. Crimp connector must be properly crimped. 2. Black sensor wire is connected to the black wire of the harness cable. Crimp connector must be properly crimped. 3. Sensor leads should be protected with split tubing and tie wrapped in place. Wires should be routed at least 12” (30cm) away from sparkplug wires, the coil, and the alternator.
ANSWERS TO COMMON QUESTIONS • “BAT” stays on when display is connected to harness cable. The wire connections to the harness cable are probably not correct. Inspect your wiring. See 1-5 on page 21. • “BAT” comes on when ignition is turned off and display is plugged into harness cable. The DriveRight display is connected to switched +12V instead of unswitched +12V. Connect to unswitched +12V. See Step 2 on page 7. • “BAT” appears when display is connected to harness cable but flashes off when dot appears.
• Knocking sounds are coming from under the vehicle. The magnet is hitting the vehicle or mounting bracket while rotating. Inspect the sensor installation and reinstall as needed. See “Sensor Installation” on page 10. • Current Readings are zero but everything appears properly installed. You may have loose or poor connections and/or a broken wire inside of wire insulation. Use “Sensor Wire Continuity Test” on page 23 to locate problem wiring. Tighten crimps and/or replace wire.
5. WARRANTY & REPAIR INFORMATION ONE YEAR LIMITED WARRANTY We warrant our products to be free of defects in material and workmanship for the period of one year from the date of original purchase. While we make every effort to carefully manufacture our products to the highest standards of quality, occasionally parts may be found to be missing, defective, or damaged. If you have a defective part, return the product to us, shipping charges pre-paid.
