I have a 90 civic SI hatch with a avant guard 5 Clifford alarm system. My problem is that when I manually start the car it wont start because every time the clutch is depress the voltage from the starter wire drops to 9.23 volts when cranking not enough to turn the motor over. But it puts out 11.97 volts without depressing the clutch.

I checked the input from the key side and output from the starter side and same thing.

I disconnected the negative when remote start wire that go's to the clutch wire but still the same thing.

Constant, ignition, and accessories show 11.97 volts.

90% of the time if I remote start the car it works, 10% if manually starting it.

I checked all connections at the battery, ground connections where I can find it and used a wire brush on spots that's needed.

Checked for any loose connections.

From the way it looks I guess I can rule out that it is the alarm system.

What can be causing this to happen?

Has anyone experience this before?

 

Bad starter cut relay or it's wiring/connections, remote start output, white/blue is connected after, [starter side] of cars cut starter lead.
To confirm or exclude this as the problem, remove starter cut relay out of system, reconnect the cars cut starter wire, black/white, this can also be done by unplugging immobilizer plug, [4 pin molex] and jumping the starter lead in/out terminals and the ign. lead in/out terminals. 94