Remote Starter

Remote Starter Switch

revised 1-2-06

This project describes adding a remote starter switch to your 911. Instructions are generic and should apply to most any vehicle.

When an ignition switch wears out, it is the "start" or "crank" position that usually wears out first. The symptoms include intermittent cranking or a no crank signal. One option is to replace the switch. On later 911s, the electrical portion of the switch can be replaced. Complete, new switches are $400+ and some early 911 switches are no longer available (NLA).

One way to prolong switch life is to install a remote or auxilliary switch to energize the starter. It involves installing a relay closer to the starter, and when energized by the remote switch, provides the switching and the electrical connection between source voltage and the starter solenoid. Following this modification, the existing ignition switch remains fully operational. However, when the ignition switch is in the ON position, the remote switch is able to crank and start the engine.

click the following images for a larger view

1.

This is an early ignition switch removed from the instrument panel. When the ignition is In the "crank" position, the battery energizes the starter solenoid via this yellow wire (terminal 50).

Due to corrosion and wear in the switch and circuit, increasing voltage drop may prevent the solenoid from being energized.

Note:
This project does not require removing or modifying this switch.

Parts Needed:
- ON-Off momentary switch (~10A rating)
- Bosch-equivalent 1M-1B relay (~25A rating)
- Inline fuse holder with 10A fuse
- ~10' 14-16 ga wire
- ~ 6' 10-12 ga. wire
- 1/4" male spade piggyback adapter
- ~4' 1/4" heat shrink tubing
- Assorted ring and 1/4" female spade terminals

Download this wiring diagram (PDF) that describes the electrical connections to the existing circuit.

2.

Install the momentary switch in an unused switch hole or drill appropriate hole. Route and connect wires from the switch to the fuse box and through the center tunnel.

Note:
Photo shows installation in the existing sunroof switch opening with an optional switch cover.

On some models, an opening for an optional rear wiper switch is located further to the left, above the ignition switch.

3.

Install relay and fuse holder in tunnel area.

Route and connect ground, remote switch, solenoid and source voltage wires to the relay.

Click image for get more information on how the Bosch relay works and for installation details.

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© 2006 Sherwood Lee


Remote Starter Switch			revised 1-2-06
This project describes adding a remote starter switch to your 911. Instructions are generic and should apply to most any vehicle. When an ignition switch wears out, it is the "start" or "crank" position that usually wears out first. The symptoms include intermittent cranking or a no crank signal. One option is to replace the switch. On later 911s, the electrical portion of the switch can be replaced. Complete, new switches are $400+ and some early 911 switches are no longer available (NLA). One way to prolong switch life is to install a remote or auxilliary switch to energize the starter. It involves installing a relay closer to the starter, and when energized by the remote switch, provides the switching and the electrical connection between source voltage and the starter solenoid. Following this modification, the existing ignition switch remains fully operational. However, when the ignition switch is in the ON position, the remote switch is able to crank and start the engine. click the following images for a larger view
	1.	This is an early ignition switch removed from the instrument panel. When the ignition is In the "crank" position, the battery energizes the starter solenoid via this yellow wire (terminal 50). Due to corrosion and wear in the switch and circuit, increasing voltage drop may prevent the solenoid from being energized. Note: This project does not require removing or modifying this switch. Parts Needed: - ON-Off momentary switch (~10A rating) - Bosch-equivalent 1M-1B relay (~25A rating) - Inline fuse holder with 10A fuse - ~10' 14-16 ga wire - ~ 6' 10-12 ga. wire - 1/4" male spade piggyback adapter - ~4' 1/4" heat shrink tubing - Assorted ring and 1/4" female spade terminals Download this wiring diagram (PDF) that describes the electrical connections to the existing circuit.

	2.	Install the momentary switch in an unused switch hole or drill appropriate hole. Route and connect wires from the switch to the fuse box and through the center tunnel. Note: Photo shows installation in the existing sunroof switch opening with an optional switch cover. On some models, an opening for an optional rear wiper switch is located further to the left, above the ignition switch.
	3.	Install relay and fuse holder in tunnel area. Route and connect ground, remote switch, solenoid and source voltage wires to the relay. Click image for get more information on how the Bosch relay works and for installation details.



back to home page


© 2006 Sherwood Lee