Here is a general map of what you are doing.   I suggest that if you have a cell phone, you call a friend as you hit Ensenada and have them check the website of  the homeland security boarding crossing times.   http://apps.cbp.gov/bwt/ send that link to your friends and have them give you the crossing times of the three potential crossings.     that way you can determine which you should cross at.  Call them for an update, and call them back in 5 minutes when they have the information, after all your cell phone minutes may be expiring.   also in Ensenada the McDonalds by the walmart has open wifi.     

following that persons notes exiting off HWY 1 toll, at Puerto Nuevo/Cantamar exit. , this is roughly 40-50 km north of Ensenada on 1D toll road, at KM marker 50 or as you get to the first toll booth 29.5 miles ahead, you do not hit the second toll booth.; here is the google link location to this position, 32.227702,-116.919198  you will have to copy and paste.


Here is a map of the Puerto Nuevo/Cantamar sign on toll road 1D, exit there to the right, then you curl around under the road and take a right heading north towards TJ. this exit puts you on Mexico 1 free road and it is a good road.

you take a right going north when you get to the end of the exit to the old HWY 1 road.  Also note this road is a bit rough for a few miles

go north Right on this road several miles maybe 5-10 minutes (reported 8.5 miles), then there may be a military check point, and immediately after that take a right at the below stop sign it is highway 2000. see the signs below. and map after it.

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offramp

this road is a 4 lane divided hwy, with a huge median. Very little traffic on it except tt the walmart area is but you to not have a stop sign or traffic light on it at all. Slow down by the walmart area because busses let people out right on this road and they run across. Just stay on this road till you see the sign below it is huge, you can not miss it and go right at it. .to san diego.... it goes to Otay Mesa.  exit to Tijuana san Diego as shown below to the right.

once you turn off you will basically end up in a little traffic and there are about 3-5 lights and stop signs, once you go
past the McDonalds the next block you will see the sign to take a right at, it is two blocks from McDonalds.

To make it easier there is one split that may confuse you as it did me the first time,
if you go to the left onto the bridge it will make your trip easier. I have a picture of that next. go to the left onto it.
and here are a few other signs you will see.

It takes about 10-15 minutes after you exit rd 2000 to get to the border
crossing. you do not turn till the road past the McDonalds...



a few signs you will see on the way just keep going straight but veer to the left as the arrow shows to avoid traffic...





after the mcdonalds (two more blocks) turn here to the right at the below sign, you can not miss this sign.   then in several blocks you hit the border without turning.

if in a RV it is recommended that you use far right lane because of mandatory secondary inspection.  

remember almost all USA mcDonalds have free internet on the road as well as starbucks in the USA. .