How do I fix the click click start problem on a Mazda RX-7 FD by removing the original equipment manufacturer security relay?

The "click click start" issue is a well-known voltage drop problem on the FD RX-7. Over time, resistance builds up in the starting circuit, and the OEM security starter cut relay (H302) is a common bottleneck. Bypassing it is a straightforward process that restores proper voltage to the starter solenoid.

Difficulty: Easy (Takes about 10 minutes)

Here is how to bypass the OEM security relay:

1. Locate the Relay: The OEM security relay (H302) is located behind the driver's side kick panel, right next to the dead pedal ². (Note: If you have a JDM/RHD vehicle, this relay is not fitted from the factory).
2. Remove the Relay: Unplug the relay from the wiring harness and remove it completely.
3. Jumper the Connector: Look at the harness connector you just unplugged. Identify the two terminals that correlate to the thickest wires (one of these is a thick black wire with a blue stripe). Insert a heavy-gauge jumper wire between these two terminals to permanently link them ².

Important Side Effect: By jumpering this plug, you bypass the relay altogether. The only side effect is that you lose the factory alarm's starter lockout feature—meaning if the alarm is triggered, the ignition will no longer cut the starter ².

Alternative Wiring Option: If simply jumpering the plug doesn't completely cure the click issue due to degraded wiring further down the line, you can run a dedicated 10-gauge wire directly from the large black/blue wire at the security relay plug straight through the firewall to the starter ².

If you still experience the click after this bypass, the next culprits to check are a failing ignition switch (which can twist in its housing or have corroded copper contacts) or the starter solenoid itself.