JohnB
Newbie
1990 GMC C1500 Sierra, TBI 5.7 L. Passenger side header (Pacesetter Shorty) gasket has been leaking for months. Crappy fiber gasket just failing apart. Decided to replace gasket with AC Delco multi layered metal #12550033. OK. First thing I do is disconnect ground cable on battery. Then start to work. Remove the K&N air intake. Removed bolts and spark plug wire brackets. Disconnect the #4 and #2 spark plug wires to get better access. Header bolts OK and easily removed since headers were installed in frame-off restoration in 2016. Old gasket just shattered in about 30 pieces. Header can be eased away from block but to make it easier, I decide to remove the 3 old and rusted bolts holding header to Walker Y pipe, and replace with new grade 8 bolts and brass nuts and lock washers (that was 2-days of fun).
Get everything back together OK. Go out for road test and I notice the heater, vent, air display is crazy light up and nothing works. See attached photo. No fan. Vents not opening. No air. No heat control. Wondering if I inadvertently jiggled or disconnected some wires in the engine compartment. Checked for anything obvious. Jiggled wires at connectors. Popped a few connectors. Checked the under panel heater fuse (OK). NADA, NOTHING. Pulling the fuse shuts down the display.
When I reconnected the battery, did I fry something ? Anybody see anything like this? Any ideas on a fix ? Or am I heading to an auto electronics repair shop. I'll be searching forums for anything similar, but most of these responses have to do with a loose connection at the panel... either light up or not light up.
Get everything back together OK. Go out for road test and I notice the heater, vent, air display is crazy light up and nothing works. See attached photo. No fan. Vents not opening. No air. No heat control. Wondering if I inadvertently jiggled or disconnected some wires in the engine compartment. Checked for anything obvious. Jiggled wires at connectors. Popped a few connectors. Checked the under panel heater fuse (OK). NADA, NOTHING. Pulling the fuse shuts down the display.
When I reconnected the battery, did I fry something ? Anybody see anything like this? Any ideas on a fix ? Or am I heading to an auto electronics repair shop. I'll be searching forums for anything similar, but most of these responses have to do with a loose connection at the panel... either light up or not light up.
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