Identification of windshild wiper arm

[schaats]

Hi, mud members,

I need help about how can I distinguish windshield wiper arm between RH and LH.
I'd aparted wiper arm without pre-marking that can't determin which one is driverside and the other is passenger side.
I watched wiper arm carefully and the only difference I could find is carved numbers on back side of wiper arm. (see photos)
One is 2186 and the other is 2187 but it's not enough to figure out.

I'v searched Toyota catalog and found P/N of RH is 85190-90A02 and LH is 85210-90A01.
These P/N tell me they are different but look almost same.
Can you help me to distinguish?

 

[lovetoski]

I just went out to take a look at my 1987 fj60. I found the numbers you mention, and 2187 is on the DS, while 2186 is on the PS. DS = drivers side (left side) and PS = passenger side (right side).

However, as you mention, the two arms look the same. I removed mine about 2 years ago to repaint them. I do not know if I was careful about re-installing them on the same side as they were originally. I am usually pretty careful about things like this, but do not remember exactly how I did it.

Sorry I cannot help more than this.

Best Regards