craziest problem i've ever heard of

[dg7.3]

i have a 99 7.3 188k and as of recent when idling if i turn wipers on high the truck immediately shuts off. if i use them on interval no problem but on high immediate shut down as if i turned the key off. also brakes whine and powersteering whines and i have noticed radio lights kinda surging i don't know if it's all related but any advice will be greatly appreciated.

[erbilabuc]

check voltage on batteries, they might be going out. Replace both if either is bad.

[NoRalPh]

Actually, this is not an uncommon event!

Lots of posts here talking about "my truck dies in the rain" turns out to be wiper related. IIRC, Many attribute this to a bad CPS (I know, doesn't seem logical, but apparently they Can be related...)

Do a search and read some of them

Brakes & PS are very related to each other, but Not to wipers too. Your PS pump is the power for the PBs and if the pump is low on fluid or crapping-out you have problems with both.

[dg7.3]

thanks had already changed cps, but got up this morning and had dead batteries and they wouldn take a charge so i replaced them maybe that was the problem
thanks again for the help

[Degnol]

I think any voltage drop below 10v will cause big problems. Turning the wipers on high probably pushed the weak batteries over the top and caused the voltage to drop.
Glad you found/solved the problem. What did you replace them with, Motorcraft?

[Degnol]

Not looking forward to buying bigassed batteries two at a time. Just got over buying 6 tires

[dg7.3]

yeah got two golds 850cca i hear ya in the last month i have done tranny, tires, batteries, water pump, and lost my superchip tunes. lol what a month