97 GMC trailer plug question
Question:
would this apply to 99 Yukon, just got it bought it used it has wires taped up on left side of frame but they are scotch-lock connections, it appears to be anyway. Just checkin cause I plan on installing a trailer hook up also. —
– Hide quoted text — Show quoted text -> Your ‘burb should have the factory installed trailer harness running down the > left side frame rail and ending in the back all taped up. If that those are the > wires you are talking about, the other ends of the orange and blue wires should > be folded and taped up in a harness sort of under your brake master cylinder. > If you untape and unfold them, the orange one should already have a ring > terminal on it. That hooks to one of the posts on your underhood fuse/relay > center and will be the constant 12v charge wire. The blue wire goes through the > firewall to your trailer brake controller in the cab. > Double check on this part, but I think if the harness in back has never been > untaped and installed before, the big white wire for ground has a ring terminal > on it but is not grounded. You will have to bolt it to one of the bumper bolts > or trailer hitch bolts. > Hi all, > I am new to this group, just having traded the 86 Ford pickup for a 97 GMC > Suburban!! Trying to get the new truck outfitted for towing, I was trying > to put my 7 way trailer plug on the truck. I have the blue wire for the > brake controller and there is a red wire in the harness which I thought was > the charge line, but there is no power to it. Did these trucks come wired > with a charge line? I probed the wire with a test light with the truck > running and not running, still no juice. > If I have to run a wire myself, should I hook up directly to the battery or > to the accessory post on the fuse box? > Sorry for all the questions, but this is my first GM product since my ol’ 84 > s-10 Blazer!! > Regards, > Tony > 97 GMC Suburban 1500 4×4 > Portland, Oregon
Response:
To the best of my knowledge, the ‘99 trucks with the C/K front end (Yukon included), use the same wire harness as all older ones (post ‘88). My last two ‘93 K-5 and ‘98 K2500 have the exact same harness. Dennis K2500
Response:
Hi all, I am new to this group, just having traded the 86 Ford pickup for a 97 GMC Suburban!! Trying to get the new truck outfitted for towing, I was trying to put my 7 way trailer plug on the truck. I have the blue wire for the brake controller and there is a red wire in the harness which I thought was the charge line, but there is no power to it. Did these trucks come wired with a charge line? I probed the wire with a test light with the truck running and not running, still no juice. If I have to run a wire myself, should I hook up directly to the battery or to the accessory post on the fuse box? Sorry for all the questions, but this is my first GM product since my ol’ 84 s-10 Blazer!! Regards, Tony 97 GMC Suburban 1500 4×4 Portland, Oregon
Response:
> If I have to run a wire myself, should I hook up directly to the > battery or > to the accessory post on the fuse box? <snipped>
By all means, connect through an adequate fuse. Without the fuse, if the wire were to rub and short to the chassis, a fire could result. Can’t troubleshoot your absence of power on the connector from here, but FYI, the connections to that connector, looking at the vehicle end, should be; one o’clock + 12 volts 3 o’clock Right turn, right brake light 5 o’clock Brake control 7 o’clock ground 9 o’clock left turn, left brake light eleven o’clock running lights center pin backup lights Cartan * Sent from RemarQ http://www.remarq.com The Internet’s Discussion Network * The fastest and easiest way to search and participate in Usenet – Free!
Response:
Your ‘burb should have the factory installed trailer harness running down the left side frame rail and ending in the back all taped up. If that those are the wires you are talking about, the other ends of the orange and blue wires should be folded and taped up in a harness sort of under your brake master cylinder. If you untape and unfold them, the orange one should already have a ring terminal on it. That hooks to one of the posts on your underhood fuse/relay center and will be the constant 12v charge wire. The blue wire goes through the firewall to your trailer brake controller in the cab. Double check on this part, but I think if the harness in back has never been untaped and installed before, the big white wire for ground has a ring terminal on it but is not grounded. You will have to bolt it to one of the bumper bolts or trailer hitch bolts. – Hide quoted text — Show quoted text -> Hi all, > I am new to this group, just having traded the 86 Ford pickup for a 97 GMC > Suburban!! Trying to get the new truck outfitted for towing, I was trying > to put my 7 way trailer plug on the truck. I have the blue wire for the > brake controller and there is a red wire in the harness which I thought was > the charge line, but there is no power to it. Did these trucks come wired > with a charge line? I probed the wire with a test light with the truck > running and not running, still no juice. > If I have to run a wire myself, should I hook up directly to the battery or > to the accessory post on the fuse box? > Sorry for all the questions, but this is my first GM product since my ol’ 84 > s-10 Blazer!! > Regards, > Tony > 97 GMC Suburban 1500 4×4 > Portland, Oregon
Response:
I’m not sure if the ’99s use the same harness as the older ones or not. If you pull the wires down a little bit and look at them, there should be an orange one and a big blue one, and I think one other small one (for trailers w/o electric brakes). If that is what you have, then they should be the same. I just don’t know if they changed the harness to match the ‘99 Silverado’s, which use a different harness than the older trucks. Anyone? – Hide quoted text — Show quoted text – > would this apply to 99 Yukon, just got it bought it used it has wires taped > up on left side of frame but they are scotch-lock connections, it appears to > be anyway. Just checkin cause I plan on installing a trailer hook up also. > — > Your ‘burb should have the factory installed trailer harness running down > the > left side frame rail and ending in the back all taped up. If that those > are the > wires you are talking about, the other ends of the orange and blue wires > should > be folded and taped up in a harness sort of under your brake master > cylinder. > If you untape and unfold them, the orange one should already have a ring > terminal on it. That hooks to one of the posts on your underhood > fuse/relay > center and will be the constant 12v charge wire. The blue wire goes > through the > firewall to your trailer brake controller in the cab. > Double check on this part, but I think if the harness in back has never > been > untaped and installed before, the big white wire for ground has a ring > terminal > on it but is not grounded. You will have to bolt it to one of the bumper > bolts > or trailer hitch bolts. > > Hi all, > > I am new to this group, just having traded the 86 Ford pickup for a 97 > GMC > > Suburban!! Trying to get the new truck outfitted for towing, I was > trying > > to put my 7 way trailer plug on the truck. I have the blue wire for the > > brake controller and there is a red wire in the harness which I thought > was > > the charge line, but there is no power to it. Did these trucks come > wired > > with a charge line? I probed the wire with a test light with the truck > > running and not running, still no juice. > > If I have to run a wire myself, should I hook up directly to the battery > or > > to the accessory post on the fuse box? > > Sorry for all the questions, but this is my first GM product since my > ol’ 84 > > s-10 Blazer!! > > Regards, > > Tony > > 97 GMC Suburban 1500 4×4 > > Portland, Oregon
