xB Leaving Pit Soon
Following are some observations from when I installed the Rostra cruise control kit number 250-1755 on my 2005 xB with automatic transmission. The online instructions at their website may have improved since September of 2005.Awesome huge thanks 🤘🏼🤘🏼🤘🏼
Step 1 No need to remove the firewall grommet. Removing it does not make it easier to cut and reinstalling it can be troublesome. The grommet has two membranes, and both need to be cut. Make a cut on the engine compartment side and then cut at the same level on the interior side. Push a thin solid wire rod through as a feeder line into the interior, then wrap the cruise harness wire around the feeder and pull it back into the engine compartment. The putty supplied with the kit works very well for sealing the cut.
Step 2 In order to accommodate the throttle cable which runs beneath the cruise control’s mounting bracket, install the control module at an angle with the front slanted upward.
Step 3 Difficult to use the throttle cable clip to route; you may choose to ignore this instruction. The cable assembly follows the vehicle’s throttle cable, but it does not easily tie to, nor fit in, the cable clip. This is not important if the cable does not droop or kink.
Step 4 Difficult to get a torque wrench in position to tighten this nut. Take the throttle to the physical stop and then tighten it. It is not easy to see which cable nut is the rear, but either of the two will accept the throttle lever bracket and this does not matter if the length is adjusted to have only a slight slack (0.06” - 0.10”). The note in a box on the bottom left of Page 5 states to remove the threaded snap-in connector to adjust slack; but does not say how. Take a screwdriver and gently pry out the fitting. Then it is easy to adjust and readjust until there is only slight play.
Step 5 Strange; in the Rostra instructions document, there is not a Step 5.
Step 6 The brake switch is the black connector at the top of brake pedal, not the white one further up under dash.
Step 7 Skip this step for automatic transmission models.
Step 8 Almost impossible to twist around in the car to see what is shown in figure 16B, and difficult to remove connectors and add a wire.
Identifier 1N is not indicated anywhere on the connector.
Figure 16C is showing the pin side connectors and they are mirror images to what can be seen on the car. The wire needed is on the bottom row, second wire in, starting from the outboard of the passenger side of the car. The xB has a black and white wire in position 6.
Add a circuit fuse in the unused fuse slot above the 15-amp fuse marked ACC. Cut off its receptacle connector and clamp or solder on a blade connector, then place it on an unused terminal at the front of the fuse box. Test for a power slot that is switched. The cruise control has two fuses of its own.
Step 9 In both the printed paper instructions which come with the cruise control, and in the PDF version of the instructions, Figure 20 is too poor to determine which connector is the one needed. Figure 19 shows the connectors facing the pin side. Since it is not necessary to disconnect the connector, the installer never sees the pin side. The installer would assume the picture is of the slot side; it is not. Reverse the image for a better understanding.
There are four connector plugs in a horizontal row under the dash, directly below the glove box. VSS is on the second connector from the right. The connector is black. The VSS wire is in the second row up, rightmost, pin 17, which is a violet and white stripe wire on the 2005.
NSS is on the third connector from the right. The connector is white. The NSS wire is in the third row up, rightmost, pin 8, and is black.
Step 10 The lower steering cover has three screws and requires rotating the steering wheel to access. The instructions do not specify if the hole is drilled in front or behind the rib on the inside of the column cover. Following the 5/8" instruction, the hole comes out on a rib. Mounting to the side of the rib closer to the steering wheel seems to be best. Measure carefully and drill adjunct to a plastic rib on the back side, which must then be trimmed or torn off with pliers to get the shroud, the lock, and the jam nuts, to fit.
NOTE: The bolt identified in the kit as M-6 was left over. Maybe it has something to do with installing the kit in a manual transmission xB.
Hope these can assist your installation.