Installation & Mounting:
Before installation, examine the LED heads for transit damage.
Do not use damaged or broken parts.
Caution: When drilling into any vehicle surface, make
sure the area is free from any electrical wires, fuel lines,
vehicle upholstery, etc. that could be damaged
Important! This unit is a safety device, and it must be con-
nected to its own separate, fused power point to assure its
continued operation should any other electrical accessory fail.
Mounting:
The 3730 LED heads are surface mounted by screwing through
the two front-mounting bosses. The LED heads can be stacked
vertically or horizontally to provide higher intensity where re-
quired.
1. The 3730 series LED heads should be mounted to a at
surface or one with the least amount of curvature. The
mounting location should allow the maximum visibility of
the warning device to other road users, while allowing for
sufcient wire access.
2. Using the supplied mounting gasket as a template, mark
the drill hole locations on the mounting surface. Details of
the hole locations are also given in Figure 1.
Figure 1 - Rear of LED head. Dimensions are in inches [mm].
3. Drill mounting holes using a #31[0.120”] drill bit.
4. Drill a 25/64”[10mm] hole for the wires protruding from the
rear of the unit at the location in Figure 1. Remove any
sharp edges from this hole.
5. Mount the LED Head along with the mounting gasket, rout-
ing the wires through the 10mm hole and use additional
grommets or cable protection as necessary to protect the
wiring from any sharp edges. Secure the LED head to the
surface using the #6 self-tapping screws as supplied.
Wiring Instructions
The 3730 LED heads are self-ashing units. A 3A fuse must be
used for each set of up to and including 4 LED heads
Wire functions are as follows:
Green Wire: Ground. Connect to either the battery negative
terminal or a suitable chassis point.
Red Wire: Power. Switch to +12/24V to operate the ash-
er. Must be powered through the fuse, located
as close to the battery terminal as possible.
Yellow Wire: Flash pattern set. Apply +12/24V momentarily
(< 1 sec) to cycle through the available ash
patterns (see table below). Holding power on
this wire for > 1 sec will select the previous pat-
tern.
Blue Wire: Sync wire. Connect to other blue sync wires of
other 3730 LED heads to allow synchronizing of
ash patterns (see notes). Connecting the sync
wires together does not alter the ash patterns
in any of the LED heads – it only controls the
relative timing of the ash patterns (see notes
on page 4). This wire may also be connected to
other compatible ECCO synchronizing products.
If unused, leave unconnected and insulated.
Flash Patterns
The 3730 series LED heads can be congured to ash the
following patterns (in the order below) by momentarily applying
power to the yellow wire as described in the wiring section. The
LED head must be powered through the green and red wires to
allow pattern selection.
Flash pattern Flash rate
No. Style Phase
1. Steady N/A N/A
2. Single A 60 FPM
3. Single B
4. Single A 120 FPM
5. Single B
6. Double A
75 FPM
7. Double B
8. Triple A
9. Triple B
10. Quad A
11. Quad B
12. Quint Hold A
13. Quint Hold B
14. Fast Double A 132 FPM
15. Fast Double B
16. Pulse N/A N/A
17. Pulse8 A
75 FPM
18. Pulse8 B
19. Alternating Double A
20. Alternating Double B
21. Alternating Quad A
22. Alternating Quad B
23. Alternating Fast Double A 142 FPM
24. Alternating Fast Double B
25. Random N/A N/A
