Honda has a horrible method of grounding in many locations of the vehicles. I find it very problematic on their use of one screw with 10 ring terminals in it for grounding. First let's start with the screw head being the method of holding all the ring terminals (or even forks). Are you sure the screw is tight enough? Is it a metal screw or a machine screw, you are counting on a ground being made from the threads and captivated by the head of the screw. A metal screw gives you very little surface area on the thread for making a body or chassis ground. The body or chassis is painted so the ring or fork terminals do not make surface contact with ground. In-between all the ring or fork connectors are squeezed together, try grabbing any of the wires in the middle and rotate them side to side to find out how loose they are. I have not personally found any multiple wire connection that I couldn't wiggle the wires free This creates resistance and when you create resistance their is arcing and corrosion. Many of the problems that cannot be found is probably an improper ground.
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Using a Square D 15 terminal ground bar part number PK15GTACP that will hold wire sizes 4-AWG to 14-AWG (or smaller if solder doubled over). They can have a ground wire from the battery routed to the area of ground bar, or you can use machine screws and nuts to bond the ground bar to the chassis or body. Before attaching remove the paint from where the ground bar sits at, if the ground bar is 1/4" wide and 6" length, clean it the full width and length. Preferred methos is using a drill with wire brush. If you have any Penetrox or some Electrical joint compound for proper connection between metal parts, also it is a Oxide-inhibiting compound for preventing galvanic corrosion and enhancing connection in electrical joints. With this type of grounding you may only lose a single ground wire if not tightened properly and you could series the ground connection bars using a larger wire from the source to the series ground bar. If the bar is too big you can purchase smaller ground bars such as a 5 terminal ground bar by different manufacturers or Square D.
Using a Square D 15 terminal ground bar part number PK15GTACP that will hold wire sizes 4-AWG to 14-AWG (or smaller if solder doubled over). They can have a ground wire from the battery routed to the area of ground bar, or you can use machine screws and nuts to bond the ground bar to the chassis or body. Before attaching remove the paint from where the ground bar sits at, if the ground bar is 1/4" wide and 6" length, clean it the full width and length. Preferred methos is using a drill with wire brush. If you have any Penetrox or some Electrical joint compound for proper connection between metal parts, also it is a Oxide-inhibiting compound for preventing galvanic corrosion and enhancing connection in electrical joints. With this type of grounding you may only lose a single ground wire if not tightened properly and you could series the ground connection bars using a larger wire from the source to the series ground bar. If the bar is too big you can purchase smaller ground bars such as a 5 terminal ground bar by different manufacturers or Square D.
