Multiple problems with Volvo 2005

Rockib · Aug 10, 2017

My ac blows cold but after a while it blows hot and I have that climate control unit warning as well where should I start I have a Volvo vnl670 2013

QUALITYTRUCK · Aug 11, 2017

Sounds like possible actuator motor. It opens/closes the flaps that allow air flow thru the evaporator and heater core.

johnnyjm1982 · Nov 19, 2018

labratrans said: ↑

Agree with Pablo.
Open the driver side step and examine all battery connections - there are 3 thin wires protected by fuses - check those thoroughly. Those power your ecms. Then check the thicker wires where they start and where they end up.

Also - check connections on the starter. Both ground and positive. There is a wire connected to the starter solenoid that goes to your main fuse box. If that solenoid connection is corroded you may have problems similar to what you describe.
Hope this helps.
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hello... i recently replaced my starter with an aftermarket starter & now my lights dont work... the lights turn on while the key is off.. do u believe that the wire connected to the solenoid is the problem... whats the purpose of that wire? does it supple coltage to the main fuse box?

Jtransport · Jun 9, 2019

Rookie O/O said: ↑

I was having the same kind of trouble. The dealership replaced countles parts to no avail. Of course, each time they had the truck, they'd taken care of the problem. They, along with many other dealers/techs/whoever I asked would say check your grounds. Check your battery connections. They, as well as I knew it had to be something with the ground, somewhere. Not likely that all those faults happen all at once, then for a while, everything is ok. I fought this for about four months, not knowing when, or where this thing would finally quit for good. Then, I came across a good ole country dumb hillbilly in Tennessee. He said, "Brang it own in hyer! We-uh seef we cain't figgert ayout fer ye!" Two hours later, and the cost of a couple pieces of jumper wire, and butt-conectors later. My truck is purring like a sewing machine. There is a harness, located against the firewall, and near your brake valve dist. block/hydraulic clutch assist. Within that harness is a plug with about twelve, maybe sixteen wires going into each side. Disconect your battery cables. ALL of them. Get to this plug, and unplug it. The brass pin barrels inside the female side are likely not making connection. Or, in my case, making intermittent connection. Particularly, the larger two of the set. This was showing up as all the codes you'd mentioned. If you have the ability to get deeper into your fault diagnostics on your dash, you might find something along the way that says "J1738datalink/ data transfer erratic", or "J19**datalink/ >>>>>" Cut out the plug, for those two larger wires ONLY, and straight wire them. But, be sure to use the correct guage wiring/butt connectors. And, make absolutely certain that the new connections are sealed up real good. It took me about $4,000 dollars to learn that my problem had a two dollar fix. I asked my country dumb friend (by the way, I'm a red-neck myself. So, don't be gittn' all dignified own me, hyer.) why not replace the plug? He said I could do that if I want to pay to replace the entire wiring harness. And, at that point, "You'd jes be a tradin' a turd fer a turd." The man can't read a stop sign, or spell his own name. But, as you can see, it doesn't make him dumb. Hope this saves you some time, and money.
edit:
I'd have posted this sooner, but I wanted to make sure I wouldn't have any more trouble. This took place about seven months ago. In fact, I'd actually forgotten about it until I read this S.O.S. I paid him fifty bucks. He didn't want to take that. He said he hated to see someone pay more money for something that coulda been fixed long before then. I said, if he hadn't have fixed it, it might have cost me another four thousand. So, he took the fifty. And, that was only because it was all I had at the time.
Click to expand...

Hello, I have 4 big wires two black two white . But I noticed it’s one of the little black ones that cuts off all power in my cab ac, radio , dash lights. I got to the Mcfc plug (16 plug box)if that’s what it’s called . Wiggle it and it comes back . Took the plug off didn’t noticed any corrosion. Can I use electrical grease to see if that helps .

Volvarin · Feb 24, 2020

Rookie O/O said: ↑

I was having the same kind of trouble. The dealership replaced countles parts to no avail. Of course, each time they had the truck, they'd taken care of the problem. They, along with many other dealers/techs/whoever I asked would say check your grounds. Check your battery connections. They, as well as I knew it had to be something with the ground, somewhere. Not likely that all those faults happen all at once, then for a while, everything is ok. I fought this for about four months, not knowing when, or where this thing would finally quit for good. Then, I came across a good ole country dumb hillbilly in Tennessee. He said, "Brang it own in hyer! We-uh seef we cain't figgert ayout fer ye!" Two hours later, and the cost of a couple pieces of jumper wire, and butt-conectors later. My truck is purring like a sewing machine. There is a harness, located against the firewall, and near your brake valve dist. block/hydraulic clutch assist. Within that harness is a plug with about twelve, maybe sixteen wires going into each side. Disconect your battery cables. ALL of them. Get to this plug, and unplug it. The brass pin barrels inside the female side are likely not making connection. Or, in my case, making intermittent connection. Particularly, the larger two of the set. This was showing up as all the codes you'd mentioned. If you have the ability to get deeper into your fault diagnostics on your dash, you might find something along the way that says "J1738datalink/ data transfer erratic", or "J19**datalink/ >>>>>" Cut out the plug, for those two larger wires ONLY, and straight wire them. But, be sure to use the correct guage wiring/butt connectors. And, make absolutely certain that the new connections are sealed up real good. It took me about $4,000 dollars to learn that my problem had a two dollar fix. I asked my country dumb friend (by the way, I'm a red-neck myself. So, don't be gittn' all dignified own me, hyer.) why not replace the plug? He said I could do that if I want to pay to replace the entire wiring harness. And, at that point, "You'd jes be a tradin' a turd fer a turd." The man can't read a stop sign, or spell his own name. But, as you can see, it doesn't make him dumb. Hope this saves you some time, and money.
edit:
I'd have posted this sooner, but I wanted to make sure I wouldn't have any more trouble. This took place about seven months ago. In fact, I'd actually forgotten about it until I read this S.O.S. I paid him fifty bucks. He didn't want to take that. He said he hated to see someone pay more money for something that coulda been fixed long before then. I said, if he hadn't have fixed it, it might have cost me another four thousand. So, he took the fifty. And, that was only because it was all I had at the time.
Click to expand...

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