HDM relay in the under-hood fuse block, and see if the low beams come on. The one originally in the HDM #46 socket is bad. That relay is actually is a solid state module, not a conventional relay, and
...HDM relay. Important) Voltage is always present at the HDM fuse. When you switch on lowbeams, voltage should be present on the LT and RT fuses. Otherwise check the HDM relay or swap it with another ...
relay. It will be marked HDM #46. Swap HDM #46 with HDM#45 and see if the low beams come on. If they do come on, you need to replace HDM#46 with a new one, which you will probably have to get from the
...relay from another position to see if it is bad. There my also be relays on the firewall. Especially look for relays that are identified with the letters HDM. If you find HDM fuses/relays, swap them ...
...HDM relay both at the underhood fuseblock? Turn on the low beam and check for 12v at the LO beam fuses. If there is voltage at the fuses but the low beam ok bulbs won't light, then there's a ...
Question about 2004 Envoy
HDM relay (in the fuse block under the hood) try exchanging it with the #45 cooling fan relay and see if your low beam lights work. If they do, the HDM relay (actually solid state module, not a relay)
What is a soild state relay hdm A relay w no moving parts. Google HDM (poss high definition module?)
Question about 2004 Envoy
this mode. The HDM - is just a relay in the under hood fuse box . That is probably your problem . HDM relay #46 , fuse's HDM fuse's #53 for 4.2 l engine or fuse # 57 for 5.3 l engine . both are 15 amp
Question about 2004 Envoy
...that will occur when none of the features described above are active. The BCM will deactivate its PWM output (0% duty cycle) during this mode. HDM is a relay located in the under hood fuse box . ...
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