So I replace the pressure reduction valve in my Land Rover and I had to also put in the code so the radio works and the method I used was to leave it on II for 90 mins and then to insert the code quickly and after I did that the radio did start working but my land rover doesn’t even want to crank or use the starter?

 

I’m confused. Are you saying you had to reset your ECU in order to install a radio? Seems unnecessary. I don’t understand what leaving your battery running for 90 minutes should accomplish either, other then draining your battery…

 

Red light on the bottom center of the cluster illuminated?

 

Battery is always the first place I would check because it’s easy and batteries aren’t the most reliable. A battery can have good voltage and still be bad.

Next, the clicking noise you usually hear when your battery is dead is the starter solenoid. No click means solenoid isn’t moving. Either the solenoid is bad or the solenoid isn’t getting power. If it’s not getting power the next place to check is at the neutral or clutch safety switch. If that switch is good but doesn’t have Tutuapp 9Apps Showbox power going to it then the next place is the ignition switch

 

First start by making sure the connections are in good condition ...and the cables aren't corroded inside.And the Ground connection to the block (and the body) are good. Is there a G. wire going to the body? All switches, relays, and everything go through the ground and back to the battery, so they absolutely need to be real good. A 'clicking' starter solenid can also be due to a lousy batttery connection.

Too bad you didn't have a battery load tester. Maybe take the battery out and take it to an auto parts place for a free load test (to quick-test the integrity of the battery).

 

what if, your starter solenoid is getting power, but still not clicking? Also, when the key is left in the ignition the Rover use to beep at me as a reminder and now it no longer does it? Ignition switch or starter?