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24V Brake Relay Module - NATO pn GD43019122
The brake relay module is used to relay greater current for if the ITV is towing a trailer. The added brake and emergency flasher load is handled by the relay module, which operates towing or not, and a clicking may be heard with brake application, release, or emergency flasher operation.
The relay module was located in one of my ITV-PMs inside the front bulkhead of the compressor cover, under the air tank and behind the driver's seat. As there are various production changes, yours may be in a different location.
The module is a simple cast-aluminum box with 6-pin Deutsch connector, enclosing two socketed relays. They are automotive 24-volt, 1 Form A (normally open), with internal resistor and four .25" spade terminals. The Panasonic 2651 relay is obsolete, but apparently still alive renumbered as CB1A-R-24V. I have found at least one supplier of the relays with stock and a minimum order under 10 units at: https://www.digikey.com/en/products/...A-R-24V/647025 Equivalent quality versions from other sources should be suitable.
The box is sealed with o-rings and easy to open for service. Note each screw has a tiny o-ring under the head that is easy to lose. The unit I serviced had pliable seals, and a cleaning followed by a light smear of o-ring-safe lubricant paste resealed it. Although protected I also apply some to the terminals for corrosion resistance, out of habit. Plenty of photos below for reference. 😉
The relay module was located in one of my ITV-PMs inside the front bulkhead of the compressor cover, under the air tank and behind the driver's seat. As there are various production changes, yours may be in a different location.
The module is a simple cast-aluminum box with 6-pin Deutsch connector, enclosing two socketed relays. They are automotive 24-volt, 1 Form A (normally open), with internal resistor and four .25" spade terminals. The Panasonic 2651 relay is obsolete, but apparently still alive renumbered as CB1A-R-24V. I have found at least one supplier of the relays with stock and a minimum order under 10 units at: https://www.digikey.com/en/products/...A-R-24V/647025 Equivalent quality versions from other sources should be suitable.
The box is sealed with o-rings and easy to open for service. Note each screw has a tiny o-ring under the head that is easy to lose. The unit I serviced had pliable seals, and a cleaning followed by a light smear of o-ring-safe lubricant paste resealed it. Although protected I also apply some to the terminals for corrosion resistance, out of habit. Plenty of photos below for reference. 😉
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