I will second the idea of trying a different power cord. Switching power supplies, which most chargers are, draw a large amount of current when first powered up, but it only lasts for a second or two, and usually does not cause a problem.
If it does it with a different plug, I would suspect that the little copper nut that holds the center contact on from the back side has come loose.
Either way, unless its some kind of a custom socket for that model truck, it should be one like Shady is holding. They used to be a buck or two, and were fairly universal.
For some reason, cigarette lighter problems seem to haunt me from time to time. Several years ago, driving my truck back from a hunting trip, I hit a small bump in the highway, and the cruise control quit.
Of course I can drive without cruise control, but I wanted to know what happened. After some checking on the side of the highway, I found a blown fuse. It was labeled "cigar lighter".
Checking that, I discovered a downside to keeping a lot of spare change in the ashtray. It got full enough that a dime slid over and into the socket. Apparently the cruise control got its power from the same circuit.
A few weeks later, almost the exact opposite thing happened to a friend. I was at the local Cell store, buying an accessory of some kind. The waiting time for a phone problem looked to be about 45 minutes, and I felt lucky that I did not need to see a tech.
As I stepped out, I saw my 10th grade art teacher driving up.
She recognized me, and as we were talking she said that she was hoping to get her phone looked at on her lunch break.
She had no appointment, so I told her she probably out of luck.
I asked what was wrong with her phone. She said it would not charge in her car. I told her to let me look at it.
Of course, the last time she saw me, I was in the 10th grade. I had become a graduate electronics engineer since then, but she did not know that. She was a little nervous giving me her phone. They were still fairly new and expensive. Mostly flip and bag phones back then.
I plugged in her plug, no green light. Plugged it into my car, good strong green light.
Whipped out my penlight, looked into her lighter socket.
When I'm working on something, I tend to lock onto the problem. I muttered something about " thats easy", and started wandering around the parking lot looking down at the pavement.
Spotted a small wood stick, picked it up, pulled out my pocketknife and started sharpening it to a point.
By this time, she was saying something to the effect of she could come back later with an appointment, just hand her her phone back. I ignored her, leaned into the car, stuck the stick down into the socket, which faced straight up in that model car, and gave a little stabbing motion.
Turned around and showed her the small plastic ball of the wrapper off a mint or lozenge, stuck on the end of the stick.
She meant to throw it into the ashtray, but it went in the socket, and blocked the center post of the charger from making contact.
I don't know if she was more happy because it was fixed, or relieved because I had not done something terrible to her phone.
One more: I've told this one here before, but its been awhile, and I'm bored waiting on a phone call.
Good friend of mine was in the Navy stationed out of Jacksonville Fl. back around '73.
Came home on leave, driving a Ford Courier. Tiny truck.
We jumped in it, and went fishing. He mentioned that the lighter did not work. He did not smoke, but one of his shipmates that rode with him a lot did, and always bitched about the lighter.
I looked at it, and if you held it in, it got hot. But it would not stay in.
So, I took the lighter apart, and adjusted (bent) the little tabs that held it in until it got hot. That worked, but I still did not like the action, so I tinkered a little more. Put it back together, pushed it in, and it stayed.
About that time we got to the fishing spot, so I popped it back to the standby position and we went fishing.
Some time later, he is back in J'ville, and he and a couple of buddies are going to the beach. They put on their swim trunks, toss their wallets in the glove box, and pile in the truck.
My friend is driving, they put the smoker on the outside right, so he can use the window. Three pretty darn big guys crammed into this tiny cab. They almost could not get the doors closed.
Cruising along, the smoker asks the center guy to hold in the lighter so he can light up. My friend says you don't have to hold it in anymore, I had a guy fix it.
Center guy pushes it in, it stays.
Seems to stay a little longer than normal, then pops out.
ALL THE WAY OUT!!
Lands in the center guys lap. Goes down between his bare legs.
Chaos Ensues.
Somehow, they did not wreck. My friend called to say that both doors on his truck needed work. They actually bowed the doors out slightly from the inside.
When they finally got calmed down, found some sunburn lotion and put it on the center guy's crotch and thighs, he made a very profound statement.
That is one BadA** lighter.........