[astr]

I picked up a wrecked truck with the 4HE1TC with the intention of eventually swapping it in to my FJ62. Sorting things out, I found that it had a small electric vacuum pump in addition to the one on the back of the alternator. There is a "low vacuum" switch on the vacuum tank that turns on a "Brake" light and also turns on the vacuum pump. This pump may be an alternative for those who don't want to use the alternator vacuum pump. I is mounted in the cab, in front of the instrument cluster.