[AndZee]

Need help with my Fisher straight blade plow.
I have the plow on a 2004 GMC 2500HD gas model. It’s been fine for 2.5 seasons. About 2 weeks ago I went to use the truck (plow was NOT attached) and the battery was stone dead. I drove the truck just a few days before (no plow attached) it seemed fine.
I jumped the truck and gauges wouldn’t work, radio wouldn’t go off, interior lights wouldn’t shut off a few other oddities. So I assumed alternator?
I started to disconnect the battery to test and charge it when i disconnected the positive cable to the plow solenoid it made a noise and everything worked great in the truck.
I hooked it back up a few days later and things seem to be working until this morning when the truck randomly locked me out? Can the solenoid be causing this?? Thanks in advance!

 

[SnoFarmer]

Yes, a sticking solenoid can drain your batt.

Also it might be a good time to do a parasitic drain test.

 

[AndZee]

Even without the plow hooked up.....what type of test is that??

 

[SnoFarmer]

It will tell you what is draining your batt.
“A parasitic draw “

Parasitic battery drain test — Ricks Free Auto Repair Advice

There are two ways to test for a parasitic battery drain; current draw and voltage drop.

ricksfreeautorepairadvice.com

 

[AndZee]

Ok. But a faulty solenoid can drain the battery even without the plow hooked up?
I will Look into running this test. Thank you!

 

[Knucklebusta]

Yes, if the coil is staying engaged.