Park lights stay on

Hi MARKD55,

Happy to assist. I am going to assume that when you say the park lights stay on, they are on when the switch is in any position. In general, when we have lights staying on and ignoring switch control then that means we are getting power to the lamp circuit past the switch so when you move the switch, it is not able to "remove" the power to turn them off. So this sounds like a short to power to me.

I would suggest to start by measuring your voltage at the lamps just to level set and I would guess you have battery voltage here. Once you establish what your voltage is at the lamps you want to work backwards through the circuit towards the switch checking for power. Once you find the place that has 0v then you have past your issue. I would move back through the system, testing at the easy places to access like the underhood fuse block. Then jump to the IP fuse block, then the steering column Lamp Control Module (LCM). Finally the switch itself. The idea is to limit the system down until you locate the problem area.

As for the high beams not staying on, I suspect that may be related. There is a chance you have two separate issues but due to the park lamps staying on and being the reason for the battery drain, I would start there. Once that is resolved, we can tackle the high beams if they are still an issue. In the event that they are still an issue, it sounds like a switch issue. Especially, if they work when you turn them on, they just don't stay on. Meaning they work to flash but just do not stay on.

Below are a couple links to help with this type of testing if needed.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Please update me if I misinterpreted something or you need further assistance.

Thanks

Kenny.