Ended up figuring out it was a loose connector near the battery, see pic. Also see this related forum post that clued me into it.

Post viewtopic.php?t=50639

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This morning just before 8:00... . D6263EE5-5F90-4D77-96F4-B46DDB04C860.jpeg . Nothing but Mobil 1 5w-30 and Chevron Supreme. (Only 90 octane here, but ZERO corn syrup ). At least 6 hours of plug-in time if she’s outside. And she’ll get to run for at least a half hour before she rolls. Or the heated...

This morning just before 8:00... . D6263EE5-5F90-4D77-96F4-B46DDB04C860.jpeg . Nothing but Mobil 1 5w-30 and Chevron Supreme. (Only 90 octane here, but ZERO corn syrup ). At least 6 hours of plug-in time if she’s outside. And she’ll get to run for at least a half hour before she rolls. Or the heate...

Here are some 850 wiring diagrams:
If you have some that are not listed, feel free to share!

I spent some time reviewing videos and forums, to find out how to replace the timing belt on my 1998 S70T. Mine has the same tensioner/pulley as the 850s did - this how-to is not for the late '98 through 2000 cars. One of the things I learned is, water pump and tensioner are suggested to replace eve...

I saw the Oregon link too, but was hesitant to recommend them without seeing a picture. You figured that out. The HB4 was used at a friend of mine's trans shop for case halves, also for motorcycle engine and trans cases and you can find it locally at most Honda powersports retailers. Yes, Whatever i...

At least if using a silicone hose, it's not possible to install the upper turbo coolant hose with just your hands. Robert alludes to the technique in his video, but doesn't show it. First, slide the hose onto the reservoir pipe as far as it will go. Then, put the tip of a flathead screwdriver into t...

Topic closed - fitting at ABS pump for front hard brake line is M12x1. To replace front left hard brake line you need about 30 ft of tubing, flex line side is M10x1

Test them by running into the back of a Tesla.

Hello everyone! As shown in the What did you do to your Volvo today?-Thread I have designed a repair patch for the center tab of the dashboard kickpanel on the drivers side. What is the Issue? The mounting tab where the kickpanel is held in place by a torx screw breaks/crumbles off and the screw has...