To add a trailer brake controller and 7-Way connector to your 1999 Isuzu NPR you will first need to install a 4-Way trailer connector # 119178KIT. Then you will need to install 4 and 7-Way installation kit # ETBC7.
The ETBC7 kit includes the 7-Way and the wiring and accessories needed to install a brake controller. I have included some links to the right that explain the ETBC7 installation.
For a brake controller I recommend the Tekonsha P2, # 90885. This is our most popular brake controller... view full answer...
The great thing about brake controllers is that they are not vehicle specific so you can install one on just about anything, including your 2007 Isuzu NPR.
I do not know if your truck has a trailer connector of any kind or not so I will start from the beginning; installing a 4-Way connector. Since there are no custom fit harnesses listed for the truck you will want to use a universal hardwire kit # 119178KIT. I have linked the instructions for you.
Once you have that installed you can... view full answer...