Haltech RA10 User Manual

RA10 Instructions

Introduction: The Haltech RA10 converts the analog signal from a reluctor sensor into a

digital signal which the engine computer uses to determine the position of the crankshaft
and/or camshaft.

It has two identical channels, each with a "+" and "-" input, and one output. The two inputs of
a channel are always connected to each wire of the two-wire reluctor sensor, whether it's still
connected to the vehicle's existing engine computer or not. Please consult the diagrams for
details of different reluctor wiring setups.

The output of each RA10 channel is connected to an input of the engine computer.
There are many kinds of reluctor sensors, so each channel of the RA10 can be adjusted to

best match the signal from the reluctor sensor connected to it.
There are two blocks of small switches behind the blank end cover plate, one block for each
channel. Only ONE switch in each block should be "ON" (down).

Switch 1 (left-hand end) has lowest sensitivity, up to Switch 6 which has highest sensitivity.
Lower settings give more resistance to interference from ignition coils etc, so don't use a
higher-numbered switch than necessary.

Setup Guide: As a guide, reluctor sensors (both Trigger/crank and Home/camshaft) on most

engines will work properly with Switch 4 "ON". However some engines require different
settings. Here's a short list:

Toyota 20v 4AGE engines need Switch 4 "ON" for the Trigger (crankshaft) sensor, and
Switch 3 "ON" for the Home (camshaft) sensor.

Ford AU V8s need Switch 4 "ON" for the Trigger (crankshaft) sensor, and Switch 6 "ON" for
the Home (camshaft) sensor.

Ford Cosworth Sierra Switch 3 “ON for the Trigger (crankshaft) sensor, and Switch 4 “ON” for
the Home (camshaft) sensor.

Some Subarus need Switch 3 "ON" for both the Trigger (crankshaft) sensor and the Home
(camshaft) sensor.

Some MSD distributors have high output and need to have Switch 2 or Switch 1 "ON".
As a guide, you can start out by turning Switch 3 "ON" and see if the engine will start. If it

won't start, turn Switch 3 "OFF" and turn Switch 4 "ON" to increase sensitivity, and see if it will
start then. If the engine computer is still not getting an output from that RA10 channel during
cranking, repeat the procedure with Switch 5 and even Switch 6 if necessary.

Haltech © 2006 v1.1

Interference/Noise : If you have a problem with severe electrical noise (from ignition coil s or

alternator etc) interfering with the signals from the reluctor sensors, you can increase the
RA10's noise filtering.

Remove the end plate at the connector end of the case and move the Dipswitch 7 down to
the ON position.

Pin-outs and Wiring

Please Note: Make Sure you select the Trigger Input Type as Hall-Effect!

Haltech © 2006 v1.1