Need help to confirm low side port on Honda Accord Wagon 1991 for the A/C air conditioner. I want to be 100% I'm refilling OK on the low side port so help me. I upload the images cos there is not pictures online for wagons not even honda accords 91 only short text explanations. In the images there is 1 bigger blue cap on a larger diameter aluminium hose to refill next to the radiator and there is one black cap on a short diameter aluminium hose next to the firewall. Wich one is the correct?
I'm considering a EZ chill retrofill kit $45 or 1 can Enviro-Safe R134a R12 Replacement AC Refrigerant + Dye $7 dollars.
Image 1: http://i57.tinypic.com/2eyb71u.jpg
Image 2: http://i57.tinypic.com/1j1853.jpg
Image 3: http://i62.tinypic.com/2w5qfev.jpg

 

the low pressure port is smaller than the high pressure port. u cant mix them up. and yes if ur car has not been converted to R134a u would need to

 

Jesus I attempted to refill the blue cap hose before I came to this forum what a big mistake. It makes perfect sense now... the black cap coupler is not even compatible with the r134 134a hoses and adapters. Are u sure is the wide hose with a blue cap is the high pressure port? this blue side is compatible in size with r134 134a hoses and adapters.

 

blue cap fits then it is low pressure port. u cant get a high pressure fitting unless u get a fancy A/C gauge with both high and low pressure fittings. all @home A/C fill kits come with a low pressure port fitting. and yes they are different sizes this is universal on all makes and models

 

thanks 94 accord typeR thanks for confirming its the blue cap hose I found this you tube video also confirms this...

 

lmao if you would of read the caps it says it right on them. at least mine do that is how i knew and i been knowing for the last 4-5 years which is which
before you fill it with a/c freon make sure you vacuum the system and use manifold gauges not those cheap plug and pull BULLSHIT!! like this guy did

 

better video on how to charge a/c the RIGHT WAY not the crap way like done by the video above

 

thanks for the tips guys...