MEGATRONIX RS 110 Manual - page 3

Some newer vehicles use a 2nd starter wire which is 

required to start engine. If this is the case, wire an STR 2 

relay (not supplied) as shown below: 

Do not connect any vehicle circuits together, they are 

isolated for a resaon. 

Gr/Wht Wire 

87a 

Starter 2 Wire From 

Ignition Key Switch 

+ 12 V Constant   

Fused 25A Capable 

30 

85 

86 

87 

Auxiliary Sensor Input 

The system is designed to allow for remote starting the 

vehicle and bypassing the aftermarket alarms sensor(s). 

Most alarms are equipped with a shock impact sensor, but 

might also be equipped with a second sensor such as a 

glass, radar, or tilt sensor. 

The green wires are for the alarm’s first sensor (usually a 

shock sensor. Connect the sensor’s pre-warn and full 

trigger wires here. The blue wires are for the alarm’s 

second sensor (usually a glass, radar or tilt sensor). 

Connect the sensor’s pre-warn and full trigger wires here. 

Neutral Start Safety Test  

1. Set the vehicle parking brake. 

2. Block the drive wheels to prevent vehicle movement. 

3. Sitting in the vehicle, turn the ignition switch to “ON” 

or “RUN” position. But do not start the engine. 

4. Step on the brake pedal and shift the gear selector 

into “DRIVE” (D). 

5. Put your foot over the brake pedal but do not press 

down on it. Be ready to step on the brake to shut 

down the Remote Start Device. 

6. Start the vehicle using remote transmitter. 

a. 

If the starter does not engage, the test is complete. 

b. 

If the starter engages, immediately step on the 

brake pedal to shut down the system, recheck your 

GREEN wire (starter output wire) connection. The 

heavy gauge GREEN wire must be connected to the 

ignition switch side of the Neutral Start Switch. If the 

vehicle you are working on does not have an 

Electrical Neutral Safety Switch, it will be necessary 

to reconfigure the Remote Starts Wiring to 

accommodate this vehicle. The information 

concerning the Mechanical Neutral Safety Switch 

provided below will help you to determine if the 

vehicle you are working on has this type of safety 

switch and will provide alternate wiring methods to 

accommodate this situation. 

Mechanical Neutral Safety Switch 

Mechanical neutral safety switch configurations differ 

slightly in that they do not offer the same level of safety 

when installing a remote start device. Often when the 

ignition switch is turned off while the gear selector is in 

any position other than park or neutral, the mechanical 

function will not allow the key to be turned to the start 

position or be removed from the ignition cylinder. This 

configuration prevents mechanical operation while the 

vehicle is in gear but offers no consideration for electrical 

operation. Because of this potential problem, this 

installation requires the additional connection of a safety 

wire from the remote start device to the vehicle 

PARK/NEUTRAL ECM input or the vehicle key in sensor. 

This connection will prevent remote start operation if the 

key is left in the ignition switch regardless of the gear 

selector position. 

Park / Neutral ECM Input 

The Park / Neutral ECM input is the preferred method of 

installation. This not only maintains the integrity of the 

factory circuit, it is also the easiest to install. Providing the 

vehicle you are working on have this ECM input.